diff --git a/.ci/compile.sh b/.ci/compile.sh
index ee846897b..0a109b4f4 100755
--- a/.ci/compile.sh
+++ b/.ci/compile.sh
@@ -188,6 +188,8 @@ if [[ $RUNNER_OS == macOS ]]; then
   # we use find to get the first subfolder with the name "macos"
   # this works independent of the qt version as there should be only one version installed on the runner at a time
   export QTDIR
+  # Add QTDIR to CMAKE_PREFIX_PATH so CMake can find Qt6
+  export CMAKE_PREFIX_PATH="$QTDIR:$CMAKE_PREFIX_PATH"
 
   if [[ $TARGET_MACOS_VERSION ]]; then
     # CMAKE_OSX_DEPLOYMENT_TARGET is a vanilla cmake flag needed to compile to target macOS version
diff --git a/.ci/update_translation_source_strings.sh b/.ci/update_translation_source_strings.sh
index 884858e70..859baccbd 100755
--- a/.ci/update_translation_source_strings.sh
+++ b/.ci/update_translation_source_strings.sh
@@ -31,7 +31,7 @@ if [[ ! -e $FILE ]]; then
 fi
 
 # print version
-if ! lupdate -version; then
+if ! /usr/lib/qt6/bin/lupdate -version; then
   echo "failed to run lupdate" >&2
   exit 4;
 fi
@@ -39,7 +39,7 @@ fi
 # run lupdate, duplicating the output in stderr and saving it
 # for convenience we ignore that $DIRS will be split on spaces 
 # shellcheck disable=SC2086
-if ! got="$(lupdate $DIRS -ts "$FILE" | tee /dev/stderr)"; then
+if ! got="$(/usr/lib/qt6/bin/lupdate $DIRS -ts "$FILE" | tee /dev/stderr)"; then
   echo "failed to update $FILE with $DIRS" >&2
   exit 4;
 fi
diff --git a/.github/workflows/translations-push.yml b/.github/workflows/translations-push.yml
index c4d3f61fb..e90dc0151 100644
--- a/.github/workflows/translations-push.yml
+++ b/.github/workflows/translations-push.yml
@@ -26,13 +26,13 @@ jobs:
         shell: bash
         run: |
           sudo apt-get update
-          sudo apt-get install -y --no-install-recommends qttools5-dev-tools
+          sudo apt-get install -y --no-install-recommends qt6-l10n-tools
 
       - name: "Update Cockatrice translation source"
-        env:
-          FILE: cockatrice/cockatrice_en@source.ts
         id: cockatrice
         shell: bash
+        env:
+          FILE: cockatrice/cockatrice_en@source.ts
         run: >
           DIRS="cockatrice/src $(find . -maxdepth 1 -type d -name 'libcockatrice_*')"
           .ci/update_translation_source_strings.sh
diff --git a/CMakeLists.txt b/CMakeLists.txt
index c10e1db68..e651e88d7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,8 +5,7 @@
 # This file sets all the variables shared between the projects
 # like the installation path, compilation flags etc..
 
-# cmake 3.16 is required if using qt6
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.25)
 
 # Early detect ccache
 option(USE_CCACHE "Cache the build results with ccache" ON)
@@ -52,12 +51,11 @@ if(WIN32 OR USE_VCPKG)
   # Use vcpkg toolchain on Windows (and on macOS in CI)
   set(CMAKE_TOOLCHAIN_FILE
       ${CMAKE_CURRENT_SOURCE_DIR}/vcpkg/scripts/buildsystems/vcpkg.cmake
-      CACHE STRING "Vcpkg toolchain file"
+      CACHE FILEPATH "Vcpkg toolchain file"
   )
   # Qt path set by user or env var
   if(QTDIR
      OR DEFINED ENV{QTDIR}
-     OR DEFINED ENV{QTDIR32}
      OR DEFINED ENV{QTDIR64}
   )
 
@@ -67,7 +65,7 @@ if(WIN32 OR USE_VCPKG)
         CACHE PATH "Path to Qt (e.g. C:/Qt/5.7/msvc2015_64)"
     )
     message(
-      WARNING "QTDIR variable is missing.  Please set this variable to specify path to Qt (e.g. C:/Qt/5.7/msvc2015_64)"
+      WARNING "QTDIR variable is missing. Please set this variable to specify path to Qt (e.g. C:/Qt/5.7/msvc2015_64)"
     )
   endif()
 endif()
@@ -151,7 +149,7 @@ if(MSVC)
   set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /DEBUG /OPT:REF /OPT:ICF")
 
   add_compile_definitions(_SILENCE_STDEXT_ARR_ITERS_DEPRECATION_WARNING)
-elseif(CMAKE_COMPILER_IS_GNUCXX)
+elseif(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
   # linux/gcc, bsd/gcc, windows/mingw
   include(CheckCXXCompilerFlag)
 
@@ -174,7 +172,7 @@ elseif(CMAKE_COMPILER_IS_GNUCXX)
       -Wno-error=delete-non-virtual-dtor
       -Wno-error=sign-compare
       -Wno-error=missing-declarations
-      -Wno-error=sfinae-incomplete  # GCC 16+: Qt MOC + protobuf forward decls trigger this
+      -Wno-error=sfinae-incomplete # GCC 16+: Qt MOC + protobuf forward decls trigger this
   )
 
   foreach(FLAG ${ADDITIONAL_DEBUG_FLAGS})
@@ -200,13 +198,6 @@ endif()
 
 find_package(Threads REQUIRED)
 
-# Determine 32 or 64 bit build
-if(CMAKE_SIZEOF_VOID_P EQUAL 8)
-  set(_lib_suffix 64)
-else()
-  set(_lib_suffix 32)
-endif()
-
 if(DEFINED QTDIR${_lib_suffix})
   list(APPEND CMAKE_PREFIX_PATH "${QTDIR${_lib_suffix}}")
 elseif(DEFINED QTDIR)
@@ -221,9 +212,12 @@ message(STATUS "Update Translations: ${UPDATE_TRANSLATIONS}")
 
 include(FindQtRuntime)
 
+find_package(Qt6 6.4 REQUIRED)
+
 set(CMAKE_AUTOMOC TRUE)
 
-# Find other needed libraries
+## Find other needed libraries
+# Find Protobuf
 find_package(Protobuf CONFIG)
 if(NOT Protobuf_FOUND)
   find_package(Protobuf REQUIRED)
@@ -233,7 +227,7 @@ if(${Protobuf_VERSION} VERSION_LESS "3.21.0.0" AND NOT EXISTS "${Protobuf_PROTOC
   message(FATAL_ERROR "No protoc command found!")
 endif()
 
-#Find OpenSSL
+# Find OpenSSL
 if(WIN32)
   find_package(OpenSSL REQUIRED)
   if(OPENSSL_FOUND)
@@ -246,7 +240,7 @@ if(WIN32)
   endif()
 endif()
 
-#Find VCredist
+# Find VCredist
 if(MSVC)
   find_package(VCredistRuntime)
 endif()
@@ -282,8 +276,6 @@ if(UNIX)
       set(CPACK_RPM_MAIN_COMPONENT "cockatrice")
       if(Qt6_FOUND)
         set(CPACK_RPM_PACKAGE_REQUIRES "protobuf, qt6-qttools, qt6-qtsvg, qt6-qtmultimedia, qt6-qtimageformats")
-      elseif(Qt5_FOUND)
-        set(CPACK_RPM_PACKAGE_REQUIRES "protobuf, qt5-qttools, qt5-qtsvg, qt5-qtmultimedia")
       endif()
       set(CPACK_RPM_PACKAGE_GROUP "Amusements/Games")
       set(CPACK_RPM_PACKAGE_URL "http://github.com/Cockatrice/Cockatrice")
@@ -305,8 +297,6 @@ if(UNIX)
       if(Qt6_FOUND)
         set(CPACK_DEBIAN_PACKAGE_DEPENDS "libqt6multimedia6, libqt6svg6, qt6-qpa-plugins, qt6-image-formats-plugins")
         set(CPACK_DEBIAN_PACKAGE_RECOMMENDS "libqt6sql6-mysql") # for connecting servatrice to a mysql db
-      elseif(Qt5_FOUND)
-        set(CPACK_DEBIAN_PACKAGE_DEPENDS "libqt5multimedia5-plugins, libqt5svg5")
       endif()
     endif()
   endif()
@@ -367,7 +357,6 @@ if(TEST)
   add_subdirectory(tests)
 endif()
 
-if(Qt6_FOUND AND Qt6_VERSION_MINOR GREATER_EQUAL 3)
-  # Qt6.3+ requires project finalization to support translations
+if(Qt6_FOUND)
   qt6_finalize_project()
 endif()
diff --git a/README.md b/README.md
index 9a27601cd..f22df461f 100644
--- a/README.md
+++ b/README.md
@@ -158,7 +158,6 @@ The following flags (with their non-default values) can be passed to `cmake`:
 | `-DWARNING_AS_ERROR=0` | Don't treat compilation warnings as errors in debug mode |
 | `-DUPDATE_TRANSLATIONS=1` |  Configure `make` to update the translation .ts files for new strings in the source code<br> **Note:** `make clean` will remove the .ts files |
 | `-DTEST=1` | Enable regression tests<br> **Note:** `make test` to run tests, *googletest* will be downloaded if not available |
-| `-DFORCE_USE_QT5=1` | Skip looking for Qt6 before trying to find Qt5 |
 
 
 # Run
diff --git a/cmake/FindQtRuntime.cmake b/cmake/FindQtRuntime.cmake
index 485affe52..eecb1fcc8 100644
--- a/cmake/FindQtRuntime.cmake
+++ b/cmake/FindQtRuntime.cmake
@@ -1,8 +1,7 @@
 # Find a compatible Qt version
-# Inputs: WITH_SERVER, WITH_CLIENT, WITH_ORACLE, FORCE_USE_QT5
+# Inputs: WITH_SERVER, WITH_CLIENT, WITH_ORACLE
 # Optional Input: QT6_DIR -- Hint as to where Qt6 lives on the system
-# Optional Input: QT5_DIR -- Hint as to where Qt5 lives on the system
-# Output: COCKATRICE_QT_VERSION_NAME -- Example values: Qt5, Qt6
+# Output: COCKATRICE_QT_VERSION_NAME -- Example values: Qt6
 # Output: SERVATRICE_QT_MODULES
 # Output: COCKATRICE_QT_MODULES
 # Output: ORACLE_QT_MODULES
@@ -39,54 +38,32 @@ set(REQUIRED_QT_COMPONENTS ${REQUIRED_QT_COMPONENTS} ${_SERVATRICE_NEEDED} ${_CO
 )
 list(REMOVE_DUPLICATES REQUIRED_QT_COMPONENTS)
 
-if(NOT FORCE_USE_QT5)
-  # Linguist is now a component in Qt6 instead of an external package
-  find_package(
-    Qt6 6.4.2
-    COMPONENTS ${REQUIRED_QT_COMPONENTS} Linguist
-    QUIET HINTS ${Qt6_DIR}
-  )
-endif()
+# Find Qt and all required components, as well as Linguist
+find_package(
+  Qt6
+  COMPONENTS ${REQUIRED_QT_COMPONENTS} Linguist
+  QUIET HINTS ${Qt6_DIR}
+)
+
 if(Qt6_FOUND)
   set(COCKATRICE_QT_VERSION_NAME Qt6)
+  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
-  list(FIND Qt6LinguistTools_TARGETS Qt6::lrelease QT6_LRELEASE_INDEX)
-  if(QT6_LRELEASE_INDEX EQUAL -1)
-    message(WARNING "Qt6 lrelease not found.")
-  endif()
-
-  list(FIND Qt6LinguistTools_TARGETS Qt6::lupdate QT6_LUPDATE_INDEX)
-  if(QT6_LUPDATE_INDEX EQUAL -1)
-    message(WARNING "Qt6 lupdate not found.")
-  endif()
-else()
-  find_package(
-    Qt5 5.15.2
-    COMPONENTS ${REQUIRED_QT_COMPONENTS}
-    QUIET HINTS ${Qt5_DIR}
-  )
-  if(Qt5_FOUND)
-    set(COCKATRICE_QT_VERSION_NAME Qt5)
-  else()
-    message(FATAL_ERROR "No suitable version of Qt was found")
-  endif()
-
-  # Qt5 Linguist is in a separate package
-  find_package(Qt5LinguistTools QUIET)
-  if(Qt5LinguistTools_FOUND)
-    if(NOT Qt5_LRELEASE_EXECUTABLE)
-      message(WARNING "Qt5 lrelease not found.")
+  if(Qt6LinguistTools_FOUND)
+    list(FIND Qt6LinguistTools_TARGETS Qt6::lrelease QT6_LRELEASE_INDEX)
+    if(QT6_LRELEASE_INDEX EQUAL -1)
+      message(WARNING "Qt6 lrelease not found.")
     endif()
-    if(NOT Qt5_LUPDATE_EXECUTABLE)
-      message(WARNING "Qt5 lupdate not found.")
+
+    list(FIND Qt6LinguistTools_TARGETS Qt6::lupdate QT6_LUPDATE_INDEX)
+    if(QT6_LUPDATE_INDEX EQUAL -1)
+      message(WARNING "Qt6 lupdate not found.")
     endif()
   else()
     message(WARNING "Linguist Tools not found, cannot handle translations")
   endif()
-endif()
-
-if(Qt5_POSITION_INDEPENDENT_CODE OR Qt6_FOUND)
-  set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+else()
+  message(FATAL_ERROR "Qt6 not found")
 endif()
 
 # Establish Qt Plugins directory & Library directories
@@ -99,9 +76,6 @@ if(Qt6_FOUND)
     # Mac needs a bit more help finding all necessary components
     list(APPEND QT_LIBRARY_DIR "/usr/local/lib")
   endif()
-elseif(Qt5_FOUND)
-  get_filename_component(QT_PLUGINS_DIR "${Qt5Core_DIR}/../../../plugins" ABSOLUTE)
-  get_filename_component(QT_LIBRARY_DIR "${QT_LIBRARY_DIR}/.." ABSOLUTE)
 endif()
 message(DEBUG "QT_PLUGINS_DIR = ${QT_PLUGINS_DIR}")
 message(DEBUG "QT_LIBRARY_DIR = ${QT_LIBRARY_DIR}")
diff --git a/cmake/NSIS.template.in b/cmake/NSIS.template.in
index 5af116470..3d844c309 100644
--- a/cmake/NSIS.template.in
+++ b/cmake/NSIS.template.in
@@ -57,21 +57,13 @@ Page Custom PortableModePageCreate PortableModePageLeave
 
 Function .onInit
 
-${If} ${NSIS_IS_64_BIT} == 1    #NSIS 64bit
+${If} ${NSIS_IS_64_BIT} == 1    # NSIS 64bit
     ${IfNot} ${RunningX64}
         MessageBox MB_OK|MB_ICONSTOP "This version of Cockatrice requires a 64-bit Windows system."
         Abort
     ${EndIf}
     StrCpy $NormalDestDir "$ProgramFiles64\Cockatrice"
     SetRegView 64
-${Else}    #NSIS 32bit
-    ${If} ${RunningX64}
-        MessageBox MB_OK|MB_ICONEXCLAMATION \
-        "You are about to install a 32-bit version of Cockatrice on a 64-bit Windows system.$\n\
-        We advise you to use the correct 64-bit installer instead to get around potential issues.$\n$\n\
-        Download from our webpage: https://cockatrice.github.io"
-    ${EndIf}
-    StrCpy $NormalDestDir "$ProgramFiles\Cockatrice"
 ${EndIf}
 
 StrCpy $PortableDestDir "$Desktop\CockatricePortable"
@@ -175,27 +167,14 @@ Function AutoUninstallIfNeeded
 
 SetShellVarContext all
 
-; --- 32-bit uninstall ---
-SetRegView 32
+SetRegView 64
 ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice" "QuietUninstallString"
 
-StrCmp $R0 "" done32
-DetailPrint "Removing previous version (32-bit)..."
+StrCmp $R0 "" done64
+DetailPrint "Removing previous version..."
 ExecWait '$R0'
 
-done32:
-
-; --- 64-bit uninstall ---
-${If} ${RunningX64}
-    SetRegView 64
-    ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice" "QuietUninstallString"
-
-    StrCmp $R0 "" done64
-    DetailPrint "Removing previous version (64-bit)..."
-    ExecWait '$R0'
-
-    done64:
-${EndIf}
+done64:
 
 FunctionEnd
 
@@ -244,45 +223,23 @@ ${EndIf}
 ${If} $PortableMode = 0
     SetShellVarContext all
 
-    # uninstall 32bit version
-    SetRegView 32
+	SetRegView 64
 
-    ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice" "UninstallString"
-    StrCmp $R0 "" done32
+	ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice" "UninstallString"
+	StrCmp $R0 "" done64
 
-    ${If} $ReinstallMode = 0
-        MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION "A previous version of Cockatrice must be uninstalled before installing the new one." IDOK uninst32
+	${If} $ReinstallMode = 0
+        MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION "A previous version of Cockatrice must be uninstalled before installing the new one." IDOK uninst64
         Abort
     ${Else}
-        Goto uninst32
+        Goto uninst64
     ${EndIf}
 
-    uninst32:
-    ClearErrors
-    ExecWait "$R0"
+	uninst64:
+	ClearErrors
+	ExecWait "$R0"
 
-	done32:
-
-	# uninstall 64bit version
-	${If} ${NSIS_IS_64_BIT} == 1
-	    SetRegView 64
-
-	    ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice" "UninstallString"
-	    StrCmp $R0 "" done64
-
-	    ${If} $ReinstallMode = 0
-            MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION "A previous version of Cockatrice must be uninstalled before installing the new one." IDOK uninst64
-            Abort
-        ${Else}
-            Goto uninst64
-        ${EndIf}
-
-	    uninst64:
-	    ClearErrors
-	    ExecWait "$R0"
-
-		done64:
-	${EndIf}
+	done64:
 
 ${Else}
     Abort
@@ -345,14 +302,6 @@ ${If} $PortableMode = 0
 	WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice" "VersionMajor" "@CPACK_PACKAGE_VERSION_MAJOR@"
 	WriteRegDWORD HKLM "Software\Microsoft\Windows\CurrentVersion\Uninstall\Cockatrice" "VersionMinor" "@CPACK_PACKAGE_VERSION_MINOR@"
 
-	IfFileExists "$INSTDIR\vc_redist.x86.exe" VcRedist86Exists PastVcRedist86Check
-	VcRedist86Exists:
-		ExecWait '"$INSTDIR\vc_redist.x86.exe" /passive /norestart'
-		DetailPrint "Wait to ensure unlock of vc_redist file after installation..."
-		Sleep 3000
-		Delete "$INSTDIR\vc_redist.x86.exe"
-	PastVcRedist86Check:
-
 	IfFileExists "$INSTDIR\vc_redist.x64.exe" VcRedist64Exists PastVcRedist64Check
 	VcRedist64Exists:
 		ExecWait '"$INSTDIR\vc_redist.x64.exe" /passive /norestart'
diff --git a/cmake/gtest-CMakeLists.txt.in b/cmake/gtest-CMakeLists.txt.in
index 2062d7f8c..7f3925337 100644
--- a/cmake/gtest-CMakeLists.txt.in
+++ b/cmake/gtest-CMakeLists.txt.in
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.16)
 
 project(gtest-download LANGUAGES NONE)
 
diff --git a/cockatrice/CMakeLists.txt b/cockatrice/CMakeLists.txt
index 60ba06593..96282857c 100644
--- a/cockatrice/CMakeLists.txt
+++ b/cockatrice/CMakeLists.txt
@@ -401,8 +401,6 @@ endif(APPLE)
 
 if(Qt6_FOUND)
   qt6_add_resources(cockatrice_RESOURCES_RCC ${cockatrice_RESOURCES})
-elseif(Qt5_FOUND)
-  qt5_add_resources(cockatrice_RESOURCES_RCC ${cockatrice_RESOURCES})
 endif()
 
 # Declare path variables
@@ -429,44 +427,7 @@ if(Qt6_FOUND)
     ${cockatrice_MOC_SRCS}
     MANUAL_FINALIZATION
   )
-elseif(Qt5_FOUND)
-  # Qt5 Translations need to be linked at executable creation time
-  if(Qt5LinguistTools_FOUND)
-    if(UPDATE_TRANSLATIONS)
-      qt5_create_translation(cockatrice_QM ${translate_SRCS} ${cockatrice_TS})
-    else()
-      qt5_add_translation(cockatrice_QM ${cockatrice_TS})
-    endif()
-  endif()
-  add_executable(
-    cockatrice WIN32 MACOSX_BUNDLE ${cockatrice_MOC_SRCS} ${cockatrice_QM} ${cockatrice_RESOURCES_RCC}
-                                   ${cockatrice_SOURCES}
-  )
-  if(UNIX)
-    if(APPLE)
-      install(FILES ${cockatrice_QM} DESTINATION ${COCKATRICE_MAC_QM_INSTALL_DIR})
-    else()
-      install(FILES ${cockatrice_QM} DESTINATION ${COCKATRICE_UNIX_QM_INSTALL_DIR})
-    endif()
-  elseif(WIN32)
-    install(FILES ${cockatrice_QM} DESTINATION ${COCKATRICE_WIN32_QM_INSTALL_DIR})
-  endif()
-endif()
 
-if(Qt5_FOUND)
-  target_link_libraries(
-    cockatrice
-    libcockatrice_card
-    libcockatrice_deck_list
-    libcockatrice_filters
-    libcockatrice_utility
-    libcockatrice_network
-    libcockatrice_models
-    libcockatrice_rng
-    libcockatrice_settings
-    ${COCKATRICE_QT_MODULES}
-  )
-else()
   target_link_libraries(
     cockatrice
     PUBLIC libcockatrice_card
@@ -509,7 +470,7 @@ if(APPLE)
   set(plugin_dest_dir cockatrice.app/Contents/Plugins)
   set(qtconf_dest_dir cockatrice.app/Contents/Resources)
 
-  # Qt plugins: audio (Qt5), iconengines, imageformats, multimedia (Qt6), platforms, printsupport (Qt5), styles, tls (Qt6)
+  # Qt plugins: iconengines, imageformats, multimedia (Qt6), platforms, styles, tls (Qt6)
   install(
     DIRECTORY "${QT_PLUGINS_DIR}/"
     DESTINATION ${plugin_dest_dir}
@@ -517,12 +478,10 @@ if(APPLE)
     FILES_MATCHING
     PATTERN "*.dSYM" EXCLUDE
     PATTERN "*_debug.dylib" EXCLUDE
-    PATTERN "audio/*.dylib"
     PATTERN "iconengines/*.dylib"
     PATTERN "imageformats/*.dylib"
     PATTERN "multimedia/*.dylib"
     PATTERN "platforms/*.dylib"
-    PATTERN "printsupport/*.dylib"
     PATTERN "styles/*.dylib"
     PATTERN "tls/*.dylib"
   )
@@ -576,14 +535,12 @@ if(WIN32)
     PATTERN "*.ini"
   )
 
-  # Qt plugins: audio (Qt5), iconengines, imageformats, multimedia (Qt6) platforms, printsupport (Qt5), styles, tls (Qt6)
+  # Qt plugins: iconengines, imageformats, multimedia (Qt6) platforms, styles, tls (Qt6)
   install(
     DIRECTORY "${QT_PLUGINS_DIR}/"
     DESTINATION ${plugin_dest_dir}
     COMPONENT Runtime
     FILES_MATCHING
-    PATTERN "audio/qtaudio_wasapi.dll"
-    PATTERN "audio/qtaudio_windows.dll"
     PATTERN "iconengines/qsvgicon.dll"
     PATTERN "imageformats/*.dll"
     PATTERN "mediaservice/dsengine.dll"
@@ -593,7 +550,6 @@ if(WIN32)
     PATTERN "platforms/qminimal.dll"
     PATTERN "platforms/qoffscreen.dll"
     PATTERN "platforms/qwindows.dll"
-    PATTERN "printsupport/windowsprintersupport.dll"
     PATTERN "styles/qcertonlybackend.dll"
     PATTERN "styles/qopensslbackend.dll"
     PATTERN "styles/qschannelbackend.dll"
diff --git a/cockatrice/src/client/network/update/client/release_channel.cpp b/cockatrice/src/client/network/update/client/release_channel.cpp
index 260167bc8..338cd5ccc 100644
--- a/cockatrice/src/client/network/update/client/release_channel.cpp
+++ b/cockatrice/src/client/network/update/client/release_channel.cpp
@@ -59,7 +59,7 @@ bool ReleaseChannel::downloadMatchesCurrentOS(const QString &fileName)
         char arch[255];
         size_t len = sizeof(arch);
         if (sysctlbyname("machdep.cpu.brand_string", arch, &len, nullptr, 0) == 0) {
-            // Intel mac is only supported on macOS 13 versions
+            // Intel Mac is only supported on macOS 13 versions
             if (QString::fromUtf8(arch).contains("Intel")) {
                 return 13;
             }
@@ -74,13 +74,9 @@ bool ReleaseChannel::downloadMatchesCurrentOS(const QString &fileName)
     return rel_maj == sys_maj;
 
 #elif defined(Q_OS_WIN)
-#if Q_PROCESSOR_WORDSIZE == 4
-    return fileName.contains("32bit");
-#elif Q_PROCESSOR_WORDSIZE == 8
+#if Q_PROCESSOR_WORDSIZE == 8 // 64-bit
     const QString &version = QSysInfo::productVersion();
-    if (version.startsWith("7") || version.startsWith("8")) {
-        return fileName.contains("Win7");
-    } else {
+    if (version.startsWith("10")) {
         return fileName.contains("Win10");
     }
 #else
diff --git a/cockatrice/src/client/sound_engine.cpp b/cockatrice/src/client/sound_engine.cpp
index e592b5ea0..7a4a4f7d2 100644
--- a/cockatrice/src/client/sound_engine.cpp
+++ b/cockatrice/src/client/sound_engine.cpp
@@ -2,13 +2,10 @@
 
 #include "settings/cache_settings.h"
 
+#include <QAudioOutput>
 #include <QDir>
 #include <QMediaPlayer>
 
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
-#include <QAudioOutput>
-#endif
-
 #define DEFAULT_THEME_NAME "Default"
 #define TEST_SOUND_FILENAME "player_join"
 
@@ -40,10 +37,8 @@ void SoundEngine::soundEnabledChanged()
         qCInfo(SoundEngineLog) << "SoundEngine: enabling sound with" << audioData.size() << "sounds";
         if (!player) {
             player = new QMediaPlayer;
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
             audioOutput = new QAudioOutput(player);
             player->setAudioOutput(audioOutput);
-#endif
         }
     } else {
         qCInfo(SoundEngineLog) << "SoundEngine: disabling sound";
@@ -71,13 +66,8 @@ void SoundEngine::playSound(const QString &fileName)
 
     player->stop();
     int volumeSliderValue = SettingsCache::instance().getMasterVolume();
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     player->audioOutput()->setVolume(qreal(volumeSliderValue) / 100);
     player->setSource(QUrl::fromLocalFile(audioData[fileName]));
-#else
-    player->setVolume(volumeSliderValue);
-    player->setMedia(QUrl::fromLocalFile(audioData[fileName]));
-#endif
     player->play();
 }
 
diff --git a/cockatrice/src/game/player/player_actions.cpp b/cockatrice/src/game/player/player_actions.cpp
index df9eb8a1d..9c644a26c 100644
--- a/cockatrice/src/game/player/player_actions.cpp
+++ b/cockatrice/src/game/player/player_actions.cpp
@@ -1352,11 +1352,7 @@ void PlayerActions::actSetPT(QList<CardItem *> selectedCards, const QString &pt)
             const auto oldpt = CardItem::parsePT(card->getPT());
             int ptIter = 0;
             for (const auto &_item : ptList) {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
                 if (_item.typeId() == QMetaType::Type::Int) {
-#else
-                if (_item.type() == QVariant::Int) {
-#endif
                     int oldItem = ptIter < oldpt.size() ? oldpt.at(ptIter).toInt() : 0;
                     newpt += '/' + QString::number(oldItem + _item.toInt());
                 } else {
diff --git a/cockatrice/src/game_graphics/player/player_list_widget.cpp b/cockatrice/src/game_graphics/player/player_list_widget.cpp
index 6b1cf6cc6..4268e1019 100644
--- a/cockatrice/src/game_graphics/player/player_list_widget.cpp
+++ b/cockatrice/src/game_graphics/player/player_list_widget.cpp
@@ -25,11 +25,7 @@ bool PlayerListItemDelegate::editorEvent(QEvent *event,
     if ((event->type() == QEvent::MouseButtonPress) && index.isValid()) {
         auto *const mouseEvent = static_cast<QMouseEvent *>(event);
         if (mouseEvent->button() == Qt::RightButton) {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
             static_cast<PlayerListWidget *>(parent())->showContextMenu(mouseEvent->globalPosition().toPoint(), index);
-#else
-            static_cast<PlayerListWidget *>(parent())->showContextMenu(mouseEvent->globalPos(), index);
-#endif
             return true;
         }
     }
diff --git a/cockatrice/src/interface/card_picture_loader/card_picture_loader.cpp b/cockatrice/src/interface/card_picture_loader/card_picture_loader.cpp
index bd427a6c8..62d727704 100644
--- a/cockatrice/src/interface/card_picture_loader/card_picture_loader.cpp
+++ b/cockatrice/src/interface/card_picture_loader/card_picture_loader.cpp
@@ -312,13 +312,7 @@ bool CardPictureLoader::hasCustomArt()
     // Check if there is at least one non-directory file in the pics path, other
     // than in the "downloadedPics" subdirectory.
     while (it.hasNext()) {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 3, 0))
         QFileInfo dir(it.nextFileInfo());
-#else
-        // nextFileInfo() is only available in Qt 6.3+, for previous versions, we build
-        // the QFileInfo from a QString which requires more system calls.
-        QFileInfo dir(it.next());
-#endif
 
         if (it.fileName() == "downloadedPics") {
             continue;
diff --git a/cockatrice/src/interface/widgets/cards/card_info_picture_widget.cpp b/cockatrice/src/interface/widgets/cards/card_info_picture_widget.cpp
index 3bfd9ce7d..69b8301a9 100644
--- a/cockatrice/src/interface/widgets/cards/card_info_picture_widget.cpp
+++ b/cockatrice/src/interface/widgets/cards/card_info_picture_widget.cpp
@@ -246,11 +246,7 @@ QSize CardInfoPictureWidget::sizeHint() const
  * @brief Starts the hover timer to show the enlarged pixmap on hover.
  * @param event The enter event.
  */
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void CardInfoPictureWidget::enterEvent(QEnterEvent *event)
-#else
-void CardInfoPictureWidget::enterEvent(QEvent *event)
-#endif
 {
     QWidget::enterEvent(event); // Call the base class implementation
 
diff --git a/cockatrice/src/interface/widgets/cards/card_info_picture_widget.h b/cockatrice/src/interface/widgets/cards/card_info_picture_widget.h
index 1f065eed9..4fe84ed0b 100644
--- a/cockatrice/src/interface/widgets/cards/card_info_picture_widget.h
+++ b/cockatrice/src/interface/widgets/cards/card_info_picture_widget.h
@@ -48,11 +48,7 @@ signals:
 protected:
     void resizeEvent(QResizeEvent *event) override;
     void paintEvent(QPaintEvent *) override;
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-    void enterEvent(QEnterEvent *event) override; // Qt6 signature
-#else
-    void enterEvent(QEvent *event) override; // Qt5 signature
-#endif
+    void enterEvent(QEnterEvent *event) override;
     void leaveEvent(QEvent *event) override;
     void moveEvent(QMoveEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
diff --git a/cockatrice/src/interface/widgets/deck_analytics/resizable_panel.cpp b/cockatrice/src/interface/widgets/deck_analytics/resizable_panel.cpp
index f7bb5ac35..250fe1ad3 100644
--- a/cockatrice/src/interface/widgets/deck_analytics/resizable_panel.cpp
+++ b/cockatrice/src/interface/widgets/deck_analytics/resizable_panel.cpp
@@ -147,11 +147,7 @@ bool ResizablePanel::eventFilter(QObject *obj, QEvent *event)
         if (event->type() == QEvent::MouseButtonPress) {
             auto *mouseEvent = static_cast<QMouseEvent *>(event);
             if (mouseEvent->button() == Qt::LeftButton) {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
                 dragStartPos = mouseEvent->globalPosition().toPoint();
-#else
-                dragStartPos = mouseEvent->globalPos();
-#endif
                 isDraggingPanel = false;
                 dragButton->setCursor(Qt::ClosedHandCursor);
             }
@@ -159,11 +155,7 @@ bool ResizablePanel::eventFilter(QObject *obj, QEvent *event)
         } else if (event->type() == QEvent::MouseMove) {
             auto *mouseEvent = static_cast<QMouseEvent *>(event);
             if (mouseEvent->buttons() & Qt::LeftButton) {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
                 QPoint currentPos = mouseEvent->globalPosition().toPoint();
-#else
-                QPoint currentPos = mouseEvent->globalPos();
-#endif
                 int distance = (currentPos - dragStartPos).manhattanLength();
                 if (distance >= 5 && !isDraggingPanel) {
                     isDraggingPanel = true;
@@ -182,22 +174,14 @@ bool ResizablePanel::eventFilter(QObject *obj, QEvent *event)
     if (obj == resizeHandle) {
         if (event->type() == QEvent::MouseButtonPress) {
             auto *mouseEvent = static_cast<QMouseEvent *>(event);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
             resizeStartY = mouseEvent->globalPosition().y();
-#else
-            resizeStartY = mouseEvent->globalPos().y();
-#endif
             isResizing = true;
             resizeStartHeight = currentHeight;
             resizeHandle->grabMouse();
             return true;
         } else if (event->type() == QEvent::MouseMove && isResizing) {
             auto *mouseEvent = static_cast<QMouseEvent *>(event);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
             int deltaY = mouseEvent->globalPosition().y() - resizeStartY;
-#else
-            int deltaY = mouseEvent->globalPos().y() - resizeStartY;
-#endif
             int newHeight = resizeStartHeight + deltaY;
 
             int minAllowed = getMinimumAllowedHeight();
@@ -221,11 +205,7 @@ void ResizablePanel::dragEnterEvent(QDragEnterEvent *event)
 {
     if (event->mimeData()->hasFormat("application/x-resizablepanel")) {
         event->acceptProposedAction();
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         showDropIndicator(event->position().y());
-#else
-        showDropIndicator(event->pos().y());
-#endif
     }
 }
 
@@ -233,13 +213,8 @@ void ResizablePanel::dragMoveEvent(QDragMoveEvent *event)
 {
     if (event->mimeData()->hasFormat("application/x-resizablepanel")) {
         event->acceptProposedAction();
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         showDropIndicator(event->position().y());
         lastDragPos = mapToGlobal(event->position().toPoint());
-#else
-        showDropIndicator(event->pos().y());
-        lastDragPos = mapToGlobal(event->pos());
-#endif
 
         if (!autoScrollTimer->isActive()) {
             autoScrollTimer->start();
@@ -265,11 +240,7 @@ void ResizablePanel::dropEvent(QDropEvent *event)
         ResizablePanel *draggedPanel = reinterpret_cast<ResizablePanel *>(ptr);
 
         if (draggedPanel && draggedPanel != this) {
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
             bool insertBefore = (event->position().y() < height() / 2);
-#else
-            bool insertBefore = (event->pos().y() < height() / 2);
-#endif
             emit dropRequested(draggedPanel, this, insertBefore);
             event->acceptProposedAction();
         }
diff --git a/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.cpp b/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.cpp
index bc846bf3d..8eed083e1 100644
--- a/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.cpp
+++ b/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.cpp
@@ -321,11 +321,7 @@ void DlgSelectSetForCards::dropEvent(QDropEvent *event)
 {
     QByteArray itemData = event->mimeData()->data("application/x-setentrywidget");
     QString draggedSetName = QString::fromUtf8(itemData);
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     QPoint adjustedPos = event->position().toPoint() + QPoint(0, scrollArea->verticalScrollBar()->value());
-#else
-    QPoint adjustedPos = event->pos() + QPoint(0, scrollArea->verticalScrollBar()->value());
-#endif
     int dropIndex = -1;
     for (int i = 0; i < listLayout->count(); ++i) {
         QWidget *widget = listLayout->itemAt(i)->widget();
@@ -491,11 +487,7 @@ void SetEntryWidget::mousePressEvent(QMouseEvent *event)
     }
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void SetEntryWidget::enterEvent(QEnterEvent *event)
-#else
-void SetEntryWidget::enterEvent(QEvent *event)
-#endif
 {
     QWidget::enterEvent(event); // Call the base class handler
     // Highlight the widget by changing the background color only for the widget itself
diff --git a/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.h b/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.h
index 92f285aa0..4528552d0 100644
--- a/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.h
+++ b/cockatrice/src/interface/widgets/dialogs/dlg_select_set_for_cards.h
@@ -87,11 +87,7 @@ public:
 
 public slots:
     void mousePressEvent(QMouseEvent *event) override;
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
     void leaveEvent(QEvent *event) override;
     void dragMoveEvent(QDragMoveEvent *event) override;
 
diff --git a/cockatrice/src/interface/widgets/general/display/charts/bars/bar_chart_widget.cpp b/cockatrice/src/interface/widgets/general/display/charts/bars/bar_chart_widget.cpp
index d9e108e6a..04315d0ce 100644
--- a/cockatrice/src/interface/widgets/general/display/charts/bars/bar_chart_widget.cpp
+++ b/cockatrice/src/interface/widgets/general/display/charts/bars/bar_chart_widget.cpp
@@ -207,11 +207,7 @@ void BarChartWidget::mouseMoveEvent(QMouseEvent *e)
     if (hoveredSegment >= 0) {
         const auto &s = segments[hoveredSegment];
         QString text = QString("%1: %2 cards\n\n%3").arg(s.category).arg(s.value).arg(s.cards.join("\n"));
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         QToolTip::showText(e->globalPosition().toPoint(), text, this);
-#else
-        QToolTip::showText(e->globalPos(), text, this);
-#endif
     } else {
         QToolTip::hideText();
     }
diff --git a/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.cpp b/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.cpp
index 12ab5bb3b..1087c621e 100644
--- a/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.cpp
+++ b/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.cpp
@@ -83,19 +83,11 @@ void ColorBar::paintEvent(QPaintEvent *)
     }
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void ColorBar::enterEvent(QEnterEvent *event)
 {
     Q_UNUSED(event);
     isHovered = true;
 }
-#else
-void ColorBar::enterEvent(QEvent *event)
-{
-    Q_UNUSED(event);
-    isHovered = true;
-}
-#endif
 
 void ColorBar::leaveEvent(QEvent *)
 {
@@ -108,13 +100,8 @@ void ColorBar::mouseMoveEvent(QMouseEvent *event)
         return;
     }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     int x = int(event->position().x());
     QPoint gp = event->globalPosition().toPoint();
-#else
-    int x = event->pos().x();
-    QPoint gp = event->globalPos();
-#endif
 
     QString text = tooltipForPosition(x);
     if (!text.isEmpty()) {
diff --git a/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.h b/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.h
index 100f95310..1d435cec1 100644
--- a/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.h
+++ b/cockatrice/src/interface/widgets/general/display/charts/bars/color_bar.h
@@ -76,17 +76,10 @@ protected:
      */
     void paintEvent(QPaintEvent *event) override;
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     /**
-     * @brief Handles mouse hover entering (Qt6 version).
+     * @brief Handles mouse hover entering.
      */
     void enterEvent(QEnterEvent *event) override;
-#else
-    /**
-     * @brief Handles mouse hover entering (Qt5 version).
-     */
-    void enterEvent(QEvent *event) override;
-#endif
 
     /**
      * @brief Handles mouse hover leaving.
diff --git a/cockatrice/src/interface/widgets/general/display/charts/bars/segmented_bar_widget.cpp b/cockatrice/src/interface/widgets/general/display/charts/bars/segmented_bar_widget.cpp
index 9bad32bda..03c69373a 100644
--- a/cockatrice/src/interface/widgets/general/display/charts/bars/segmented_bar_widget.cpp
+++ b/cockatrice/src/interface/widgets/general/display/charts/bars/segmented_bar_widget.cpp
@@ -134,9 +134,5 @@ void SegmentedBarWidget::mouseMoveEvent(QMouseEvent *e)
     const Segment &s = segments[idx];
     QString text = QString("%1: %2 cards\n%3").arg(s.category).arg(s.value).arg(s.cards.join(", "));
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     QToolTip::showText(e->globalPosition().toPoint(), text, this);
-#else
-    QToolTip::showText(e->globalPos(), text, this);
-#endif
 }
diff --git a/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.cpp b/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.cpp
index b129fbe18..b71b24a40 100644
--- a/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.cpp
+++ b/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.cpp
@@ -82,11 +82,9 @@ void ColorPie::paintEvent(QPaintEvent *)
         QString label = QString("%1%").arg(int(ratio * 100 + 0.5));
 
         QFontMetrics fm(p.font());
-#if QT_VERSION >= QT_VERSION_CHECK(5, 11, 0)
+
         int labelWidth = fm.horizontalAdvance(label);
-#else
-        int labelWidth = fm.width(label);
-#endif
+
         QRectF textRect(labelPos.x() - labelWidth / 2.0, labelPos.y() - fm.height() / 2.0, labelWidth, fm.height());
 
         p.setPen(Qt::black);
@@ -96,19 +94,11 @@ void ColorPie::paintEvent(QPaintEvent *)
     }
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void ColorPie::enterEvent(QEnterEvent *event)
 {
     Q_UNUSED(event);
     isHovered = true;
 }
-#else
-void ColorPie::enterEvent(QEvent *event)
-{
-    Q_UNUSED(event);
-    isHovered = true;
-}
-#endif
 
 void ColorPie::leaveEvent(QEvent *)
 {
@@ -121,13 +111,8 @@ void ColorPie::mouseMoveEvent(QMouseEvent *event)
         return;
     }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     QPoint p = event->position().toPoint();
     QPoint gp = event->globalPosition().toPoint();
-#else
-    QPoint p = event->pos();
-    QPoint gp = event->globalPos();
-#endif
 
     QString text = tooltipForPoint(p);
     if (!text.isEmpty()) {
diff --git a/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.h b/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.h
index 7d71ea3b9..60d8e18f2 100644
--- a/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.h
+++ b/cockatrice/src/interface/widgets/general/display/charts/pies/color_pie.h
@@ -22,11 +22,7 @@ public:
 protected:
     void paintEvent(QPaintEvent *) override;
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
     void leaveEvent(QEvent *) override;
     void mouseMoveEvent(QMouseEvent *event) override;
 
diff --git a/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.cpp b/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.cpp
index 05e269174..579106540 100644
--- a/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.cpp
+++ b/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.cpp
@@ -141,11 +141,7 @@ bool AllZonesCardAmountWidget::isNonZero()
  *
  * @param event The event information for the mouse entry.
  */
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 void AllZonesCardAmountWidget::enterEvent(QEnterEvent *event)
-#else
-void AllZonesCardAmountWidget::enterEvent(QEvent *event)
-#endif
 {
     QWidget::enterEvent(event);
     update();
diff --git a/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.h b/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.h
index de4a984be..325dd1c1b 100644
--- a/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.h
+++ b/cockatrice/src/interface/widgets/printing_selector/all_zones_card_amount_widget.h
@@ -26,11 +26,7 @@ public:
     int getTokensboardAmount();
     bool isNonZero();
 
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
 
 public slots:
     void adjustFontSize(int scalePercentage);
diff --git a/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.cpp b/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.cpp
index dd5f6dd7f..b7144735e 100644
--- a/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.cpp
+++ b/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.cpp
@@ -105,11 +105,7 @@ void PrintingSelectorCardOverlayWidget::resizeEvent(QResizeEvent *event)
  *
  * @param event The event triggered when the mouse enters the widget.
  */
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void PrintingSelectorCardOverlayWidget::enterEvent(QEnterEvent *event)
-#else
-void PrintingSelectorCardOverlayWidget::enterEvent(QEvent *event)
-#endif
 {
     QWidget::enterEvent(event);
     deckEditor->updateCard(rootCard);
diff --git a/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.h b/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.h
index 52a43d220..228393c9c 100644
--- a/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.h
+++ b/cockatrice/src/interface/widgets/printing_selector/printing_selector_card_overlay_widget.h
@@ -26,11 +26,7 @@ public:
 
 protected:
     void resizeEvent(QResizeEvent *event) override;
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
     void leaveEvent(QEvent *event) override;
     void mousePressEvent(QMouseEvent *event) override;
     void customMenu(QPoint point);
diff --git a/cockatrice/src/interface/widgets/quick_settings/settings_button_widget.cpp b/cockatrice/src/interface/widgets/quick_settings/settings_button_widget.cpp
index badc437ee..3e631bd8f 100644
--- a/cockatrice/src/interface/widgets/quick_settings/settings_button_widget.cpp
+++ b/cockatrice/src/interface/widgets/quick_settings/settings_button_widget.cpp
@@ -103,11 +103,7 @@ void SettingsButtonWidget::onPopupClosed() const
 
 void SettingsButtonWidget::mousePressEvent(QMouseEvent *event)
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     if (popup->isVisible() && !popup->geometry().contains(event->globalPosition().toPoint())) {
-#else
-    if (popup->isVisible() && !popup->geometry().contains(event->globalPos())) {
-#endif
         popup->close();
     }
     QWidget::mousePressEvent(event);
diff --git a/cockatrice/src/interface/widgets/replay/replay_timeline_widget.cpp b/cockatrice/src/interface/widgets/replay/replay_timeline_widget.cpp
index 46a3dff40..e95b9f606 100644
--- a/cockatrice/src/interface/widgets/replay/replay_timeline_widget.cpp
+++ b/cockatrice/src/interface/widgets/replay/replay_timeline_widget.cpp
@@ -70,11 +70,7 @@ void ReplayTimelineWidget::paintEvent(QPaintEvent * /* event */)
 
 void ReplayTimelineWidget::mousePressEvent(QMouseEvent *event)
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     int newTime = static_cast<int>((qint64)maxTime * (qint64)event->position().x() / width());
-#else
-    int newTime = static_cast<int>((qint64)maxTime * (qint64)event->x() / width());
-#endif
     // don't buffer rewinds from clicks, since clicks usually don't happen fast enough to require buffering
     skipToTime(newTime, false);
 }
diff --git a/cockatrice/src/interface/widgets/server/chat_view/chat_view.cpp b/cockatrice/src/interface/widgets/server/chat_view/chat_view.cpp
index ccbbe9246..0a51d75c9 100644
--- a/cockatrice/src/interface/widgets/server/chat_view/chat_view.cpp
+++ b/cockatrice/src/interface/widgets/server/chat_view/chat_view.cpp
@@ -529,23 +529,13 @@ void ChatView::showSystemPopup(const QString &userName)
 
 QColor ChatView::getCustomMentionColor()
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 4, 0))
     QColor customColor = QColor::fromString("#" + SettingsCache::instance().getChatMentionColor());
-#else
-    QColor customColor;
-    customColor.setNamedColor("#" + SettingsCache::instance().getChatMentionColor());
-#endif
     return customColor.isValid() ? customColor : DEFAULT_MENTION_COLOR;
 }
 
 QColor ChatView::getCustomHighlightColor()
 {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 4, 0))
     QColor customColor = QColor::fromString("#" + SettingsCache::instance().getChatMentionColor());
-#else
-    QColor customColor;
-    customColor.setNamedColor("#" + SettingsCache::instance().getChatMentionColor());
-#endif
     return customColor.isValid() ? customColor : DEFAULT_MENTION_COLOR;
 }
 
@@ -578,11 +568,7 @@ void ChatView::redactMessages(const QString &userName, int amount)
     }
 }
 
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 void ChatView::enterEvent(QEnterEvent * /*event*/)
-#else
-void ChatView::enterEvent(QEvent * /*event*/)
-#endif
 {
     setMouseTracking(true);
 }
@@ -639,12 +625,9 @@ void ChatView::mousePressEvent(QMouseEvent *event)
 {
     switch (hoveredItemType) {
         case HoveredCard: {
-            if ((event->button() == Qt::MiddleButton) || (event->button() == Qt::LeftButton))
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
+            if ((event->button() == Qt::MiddleButton) || (event->button() == Qt::LeftButton)) {
                 emit showCardInfoPopup(event->globalPosition().toPoint(), {hoveredContent});
-#else
-                emit showCardInfoPopup(event->globalPos(), {hoveredContent});
-#endif
+            }
             break;
         }
         case HoveredUser: {
@@ -654,11 +637,7 @@ void ChatView::mousePressEvent(QMouseEvent *event)
                 switch (event->button()) {
                     case Qt::RightButton: {
                         UserLevelFlags userLevel(hoveredContent.left(delimiterIndex).toInt());
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
                         userContextMenu->showContextMenu(event->globalPosition().toPoint(), userName, userLevel, this);
-#else
-                        userContextMenu->showContextMenu(event->globalPos(), userName, userLevel, this);
-#endif
                         break;
                     }
                     case Qt::LeftButton: {
diff --git a/cockatrice/src/interface/widgets/server/chat_view/chat_view.h b/cockatrice/src/interface/widgets/server/chat_view/chat_view.h
index c5ae2b81a..506605d24 100644
--- a/cockatrice/src/interface/widgets/server/chat_view/chat_view.h
+++ b/cockatrice/src/interface/widgets/server/chat_view/chat_view.h
@@ -103,11 +103,7 @@ public:
     void redactMessages(const QString &userName, int amount);
 
 protected:
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
     void leaveEvent(QEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
     void mousePressEvent(QMouseEvent *event) override;
diff --git a/cockatrice/src/interface/widgets/server/user/user_list_widget.cpp b/cockatrice/src/interface/widgets/server/user/user_list_widget.cpp
index 09480b1a1..4bf6de336 100644
--- a/cockatrice/src/interface/widgets/server/user/user_list_widget.cpp
+++ b/cockatrice/src/interface/widgets/server/user/user_list_widget.cpp
@@ -339,11 +339,7 @@ bool UserListItemDelegate::editorEvent(QEvent *event,
     if ((event->type() == QEvent::MouseButtonPress) && index.isValid()) {
         QMouseEvent *const mouseEvent = static_cast<QMouseEvent *>(event);
         if (mouseEvent->button() == Qt::RightButton) {
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
             static_cast<UserListWidget *>(parent())->showContextMenu(mouseEvent->globalPosition().toPoint(), index);
-#else
-            static_cast<UserListWidget *>(parent())->showContextMenu(mouseEvent->globalPos(), index);
-#endif
             return true;
         }
     }
diff --git a/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.cpp b/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.cpp
index 70156df79..c35c2d0b8 100644
--- a/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.cpp
+++ b/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.cpp
@@ -137,11 +137,7 @@ void ArchidektApiResponseDeckEntryDisplayWidget::mousePressEvent(QMouseEvent *ev
     actRequestNavigationToDeck();
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void ArchidektApiResponseDeckEntryDisplayWidget::enterEvent(QEnterEvent *event)
-#else
-void ArchidektApiResponseDeckEntryDisplayWidget::enterEvent(QEvent *event)
-#endif
 {
     QWidget::enterEvent(event);
     backgroundPlateWidget->setFocused(true);
diff --git a/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.h b/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.h
index 365a99c9c..7d0526fd4 100644
--- a/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.h
+++ b/cockatrice/src/interface/widgets/tabs/api/archidekt/display/archidekt_api_response_deck_entry_display_widget.h
@@ -97,12 +97,7 @@ public slots:
 
 protected:
     void mousePressEvent(QMouseEvent *event) override;
-
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-    void enterEvent(QEnterEvent *event) override; ///< Qt6 hover enter
-#else
-    void enterEvent(QEvent *event) override; ///< Qt5 hover enter
-#endif
+    void enterEvent(QEnterEvent *event) override;
     void leaveEvent(QEvent *event) override;
 
 private:
diff --git a/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.cpp b/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.cpp
index 9d45f254b..9d294f10c 100644
--- a/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.cpp
+++ b/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.cpp
@@ -65,11 +65,7 @@ void EdhrecApiResponseCardDetailsDisplayWidget::mousePressEvent(QMouseEvent *eve
     }
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void EdhrecApiResponseCardDetailsDisplayWidget::enterEvent(QEnterEvent *event)
-#else
-void EdhrecApiResponseCardDetailsDisplayWidget::enterEvent(QEvent *event)
-#endif
 {
     QWidget::enterEvent(event);
     backgroundPlateWidget->setFocused(true);
diff --git a/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.h b/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.h
index 5daf32412..2c81e155a 100644
--- a/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.h
+++ b/cockatrice/src/interface/widgets/tabs/api/edhrec/display/cards/edhrec_api_response_card_details_display_widget.h
@@ -39,11 +39,7 @@ private:
 protected slots:
     void mousePressEvent(QMouseEvent *event) override;
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-    void enterEvent(QEnterEvent *event) override; ///< Qt6 hover enter
-#else
-    void enterEvent(QEvent *event) override; ///< Qt5 hover enter
-#endif
+    void enterEvent(QEnterEvent *event) override;
     void leaveEvent(QEvent *event) override;
 };
 
diff --git a/cockatrice/src/interface/widgets/tabs/tab_supervisor.cpp b/cockatrice/src/interface/widgets/tabs/tab_supervisor.cpp
index 52309d94b..45512ce68 100644
--- a/cockatrice/src/interface/widgets/tabs/tab_supervisor.cpp
+++ b/cockatrice/src/interface/widgets/tabs/tab_supervisor.cpp
@@ -38,18 +38,6 @@
 #include <libcockatrice/protocol/pb/serverinfo_room.pb.h>
 #include <libcockatrice/protocol/pb/serverinfo_user.pb.h>
 
-QRect MacOSTabFixStyle::subElementRect(SubElement element, const QStyleOption *option, const QWidget *widget) const
-{
-    if (element != SE_TabBarTabText) {
-        return QProxyStyle::subElementRect(element, option, widget);
-    }
-
-    // Skip over QProxyStyle handling subElementRect,
-    // This fixes an issue with Qt 5.10 on OSX where the labels for tabs with a button and an icon
-    // get cut-off too early
-    return QCommonStyle::subElementRect(element, option, widget);
-}
-
 CloseButton::CloseButton(QWidget *parent) : QAbstractButton(parent)
 {
     setFocusPolicy(Qt::NoFocus);
@@ -65,11 +53,7 @@ QSize CloseButton::sizeHint() const
     return {width, height};
 }
 
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
 void CloseButton::enterEvent(QEnterEvent *event)
-#else
-void CloseButton::enterEvent(QEvent *event)
-#endif
 {
     update();
     QAbstractButton::enterEvent(event);
@@ -117,12 +101,6 @@ TabSupervisor::TabSupervisor(AbstractClient *_client, QMenu *tabsMenu, QWidget *
     setMovable(true);
     setIconSize(QSize(15, 15));
 
-#if defined(Q_OS_MAC)
-    // This is necessary to fix an issue on macOS with qt5.10,
-    // where tabs with icons and buttons get drawn incorrectly
-    tabBar()->setStyle(new MacOSTabFixStyle);
-#endif
-
     userListManager = new UserListManager(client, this);
 
     // connect tab changes
diff --git a/cockatrice/src/interface/widgets/tabs/tab_supervisor.h b/cockatrice/src/interface/widgets/tabs/tab_supervisor.h
index 3eac144b7..d645bc7d7 100644
--- a/cockatrice/src/interface/widgets/tabs/tab_supervisor.h
+++ b/cockatrice/src/interface/widgets/tabs/tab_supervisor.h
@@ -21,7 +21,6 @@
 #include <QAbstractButton>
 #include <QLoggingCategory>
 #include <QMap>
-#include <QProxyStyle>
 #include <QTabWidget>
 
 class TabCardArtRules;
@@ -52,13 +51,6 @@ class ServerInfo_User;
 class GameReplay;
 class DeckList;
 
-class MacOSTabFixStyle : public QProxyStyle
-{
-    Q_OBJECT
-public:
-    QRect subElementRect(SubElement, const QStyleOption *, const QWidget *) const override;
-};
-
 class CloseButton : public QAbstractButton
 {
     Q_OBJECT
@@ -71,11 +63,7 @@ public:
     }
 
 protected:
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     void enterEvent(QEnterEvent *event) override;
-#else
-    void enterEvent(QEvent *event) override;
-#endif
     void leaveEvent(QEvent *event) override;
     void paintEvent(QPaintEvent *event) override;
 };
diff --git a/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.cpp b/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.cpp
index 06dc9dd84..668383663 100644
--- a/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.cpp
+++ b/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.cpp
@@ -71,11 +71,7 @@ void DeckPreviewWidget::resizeEvent(QResizeEvent *event)
     }
 }
 
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 void DeckPreviewWidget::enterEvent(QEnterEvent *event)
-#else
-void DeckPreviewWidget::enterEvent(QEvent *event)
-#endif
 {
     QWidget::enterEvent(event);
 
diff --git a/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.h b/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.h
index 0ed64e9e2..de66c194b 100644
--- a/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.h
+++ b/cockatrice/src/interface/widgets/visual_deck_storage/deck_preview/deck_preview_widget.h
@@ -72,11 +72,7 @@ public slots:
     void resizeEvent(QResizeEvent *event) override;
 
 protected:
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
-    void enterEvent(QEnterEvent *event) override; // Qt6 signature
-#else
-    void enterEvent(QEvent *event) override; // Qt5 signature
-#endif
+    void enterEvent(QEnterEvent *event) override;
 
 private:
     void updateLastModifiedTime();
diff --git a/cockatrice/src/main.cpp b/cockatrice/src/main.cpp
index ad68d4be9..b8793bc78 100644
--- a/cockatrice/src/main.cpp
+++ b/cockatrice/src/main.cpp
@@ -128,11 +128,7 @@ void installNewTranslator()
     QString lang = SettingsCache::instance().getLang();
 
     QString qtNameHint = "qt_" + lang;
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     QString qtTranslationPath = QLibraryInfo::path(QLibraryInfo::TranslationsPath);
-#else
-    QString qtTranslationPath = QLibraryInfo::location(QLibraryInfo::TranslationsPath);
-#endif
 
     bool qtTranslationLoaded = qtTranslator->load(qtNameHint, qtTranslationPath);
     if (!qtTranslationLoaded) {
@@ -277,9 +273,6 @@ int main(int argc, char *argv[])
     // force shortcuts to be shown/hidden in right-click menus, regardless of system defaults
     qApp->setAttribute(Qt::AA_DontShowShortcutsInContextMenus, !SettingsCache::instance().getShowShortcuts());
 
-#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
-    app.setAttribute(Qt::AA_UseHighDpiPixmaps);
-#endif
     app.exec();
 
     qCInfo(MainLog) << "Event loop finished, terminating...";
diff --git a/libcockatrice_card/CMakeLists.txt b/libcockatrice_card/CMakeLists.txt
index dd3799e33..ac8c7cdeb 100644
--- a/libcockatrice_card/CMakeLists.txt
+++ b/libcockatrice_card/CMakeLists.txt
@@ -21,8 +21,6 @@ set(HEADERS
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/libcockatrice_card/libcockatrice/card/card_info_comparator.cpp b/libcockatrice_card/libcockatrice/card/card_info_comparator.cpp
index 821cc8675..4133b7de0 100644
--- a/libcockatrice_card/libcockatrice/card/card_info_comparator.cpp
+++ b/libcockatrice_card/libcockatrice/card/card_info_comparator.cpp
@@ -25,22 +25,13 @@ bool CardInfoComparator::operator()(const CardInfoPtr &a, const CardInfoPtr &b)
 
 bool CardInfoComparator::compareVariants(const QVariant &a, const QVariant &b) const
 {
-    // Determine the type of QVariant based on Qt version
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     if (a.typeId() != b.typeId()) {
-#else
-    if (a.type() != b.type()) {
-#endif
         // If they are not the same type, compare as strings
         return a.toString() < b.toString();
     }
 
     // Perform type-specific comparison
-#if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
     switch (static_cast<int>(a.typeId())) {
-#else
-    switch (static_cast<int>(a.type())) {
-#endif
         case static_cast<int>(QMetaType::Int):
             return a.toInt() < b.toInt();
         case static_cast<int>(QMetaType::Double):
diff --git a/libcockatrice_deck_list/CMakeLists.txt b/libcockatrice_deck_list/CMakeLists.txt
index 5ccdb5f66..20a5185df 100644
--- a/libcockatrice_deck_list/CMakeLists.txt
+++ b/libcockatrice_deck_list/CMakeLists.txt
@@ -16,8 +16,6 @@ set(HEADERS
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/libcockatrice_deck_list/libcockatrice/deck_list/deck_list.cpp b/libcockatrice_deck_list/libcockatrice/deck_list/deck_list.cpp
index d41713302..d9d2450de 100644
--- a/libcockatrice_deck_list/libcockatrice/deck_list/deck_list.cpp
+++ b/libcockatrice_deck_list/libcockatrice/deck_list/deck_list.cpp
@@ -13,14 +13,6 @@
 #include <QTextStream>
 #include <algorithm>
 
-#if QT_VERSION < 0x050600
-// qHash on QRegularExpression was added in 5.6, FIX IT
-uint qHash(const QRegularExpression &key, uint seed) noexcept
-{
-    return qHash(key.pattern(), seed); // call qHash on pattern QString instead
-}
-#endif
-
 static const QString CURRENT_SIDEBOARD_PLAN_KEY = "";
 
 bool DeckList::Metadata::isEmpty() const
diff --git a/libcockatrice_filters/CMakeLists.txt b/libcockatrice_filters/CMakeLists.txt
index 74566ca05..55809d5fd 100644
--- a/libcockatrice_filters/CMakeLists.txt
+++ b/libcockatrice_filters/CMakeLists.txt
@@ -8,8 +8,6 @@ set(HEADERS libcockatrice/filters/filter_card.h libcockatrice/filters/filter_str
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/libcockatrice_interfaces/CMakeLists.txt b/libcockatrice_interfaces/CMakeLists.txt
index 4f34f7985..33dee842d 100644
--- a/libcockatrice_interfaces/CMakeLists.txt
+++ b/libcockatrice_interfaces/CMakeLists.txt
@@ -14,8 +14,6 @@ set(HEADERS
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(libcockatrice_interfaces STATIC ${MOC_SOURCES})
diff --git a/libcockatrice_models/libcockatrice/models/database/CMakeLists.txt b/libcockatrice_models/libcockatrice/models/database/CMakeLists.txt
index 950d6d79f..1f0331690 100644
--- a/libcockatrice_models/libcockatrice/models/database/CMakeLists.txt
+++ b/libcockatrice_models/libcockatrice/models/database/CMakeLists.txt
@@ -14,8 +14,6 @@ set(HEADERS
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/libcockatrice_models/libcockatrice/models/deck_list/CMakeLists.txt b/libcockatrice_models/libcockatrice/models/deck_list/CMakeLists.txt
index 851636a35..0c90b8004 100644
--- a/libcockatrice_models/libcockatrice/models/deck_list/CMakeLists.txt
+++ b/libcockatrice_models/libcockatrice/models/deck_list/CMakeLists.txt
@@ -6,8 +6,6 @@ set(HEADERS deck_list_model.h deck_list_sort_filter_proxy_model.h)
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/libcockatrice_network/libcockatrice/network/client/abstract/CMakeLists.txt b/libcockatrice_network/libcockatrice/network/client/abstract/CMakeLists.txt
index 2753246de..b9f4c8c9c 100644
--- a/libcockatrice_network/libcockatrice/network/client/abstract/CMakeLists.txt
+++ b/libcockatrice_network/libcockatrice/network/client/abstract/CMakeLists.txt
@@ -8,8 +8,6 @@ set(SOURCES abstract_client.cpp)
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(libcockatrice_network_client_abstract STATIC ${MOC_SOURCES} ${SOURCES})
diff --git a/libcockatrice_network/libcockatrice/network/client/local/CMakeLists.txt b/libcockatrice_network/libcockatrice/network/client/local/CMakeLists.txt
index d12a324dc..210a09ac3 100644
--- a/libcockatrice_network/libcockatrice/network/client/local/CMakeLists.txt
+++ b/libcockatrice_network/libcockatrice/network/client/local/CMakeLists.txt
@@ -8,8 +8,6 @@ set(SOURCES local_client.cpp)
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(libcockatrice_network_client_local STATIC ${MOC_SOURCES} ${SOURCES})
diff --git a/libcockatrice_network/libcockatrice/network/client/remote/CMakeLists.txt b/libcockatrice_network/libcockatrice/network/client/remote/CMakeLists.txt
index 0548700e4..fb164763c 100644
--- a/libcockatrice_network/libcockatrice/network/client/remote/CMakeLists.txt
+++ b/libcockatrice_network/libcockatrice/network/client/remote/CMakeLists.txt
@@ -8,8 +8,6 @@ set(SOURCES remote_client.cpp)
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(libcockatrice_network_client_remote STATIC ${MOC_SOURCES} ${SOURCES})
diff --git a/libcockatrice_network/libcockatrice/network/server/local/CMakeLists.txt b/libcockatrice_network/libcockatrice/network/server/local/CMakeLists.txt
index 80fb379a4..6e9dfc77b 100644
--- a/libcockatrice_network/libcockatrice/network/server/local/CMakeLists.txt
+++ b/libcockatrice_network/libcockatrice/network/server/local/CMakeLists.txt
@@ -8,8 +8,6 @@ set(SOURCES local_server.cpp local_server_interface.cpp)
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(libcockatrice_network_server_local STATIC ${MOC_SOURCES} ${SOURCES})
diff --git a/libcockatrice_network/libcockatrice/network/server/remote/CMakeLists.txt b/libcockatrice_network/libcockatrice/network/server/remote/CMakeLists.txt
index e883baa0d..48a882e9b 100644
--- a/libcockatrice_network/libcockatrice/network/server/remote/CMakeLists.txt
+++ b/libcockatrice_network/libcockatrice/network/server/remote/CMakeLists.txt
@@ -25,8 +25,6 @@ set(HEADERS
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/libcockatrice_rng/CMakeLists.txt b/libcockatrice_rng/CMakeLists.txt
index 6ff2a4537..7b091686a 100644
--- a/libcockatrice_rng/CMakeLists.txt
+++ b/libcockatrice_rng/CMakeLists.txt
@@ -6,8 +6,6 @@ set(HEADERS libcockatrice/rng/rng_abstract.h libcockatrice/rng/rng_sfmt.h libcoc
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/libcockatrice_settings/CMakeLists.txt b/libcockatrice_settings/CMakeLists.txt
index 3afe6e00a..a86cd51ea 100644
--- a/libcockatrice_settings/CMakeLists.txt
+++ b/libcockatrice_settings/CMakeLists.txt
@@ -17,8 +17,6 @@ set(HEADERS
 
 if(Qt6_FOUND)
   qt6_wrap_cpp(MOC_SOURCES ${HEADERS})
-elseif(Qt5_FOUND)
-  qt5_wrap_cpp(MOC_SOURCES ${HEADERS})
 endif()
 
 add_library(
diff --git a/oracle/CMakeLists.txt b/oracle/CMakeLists.txt
index a51982625..5029b9081 100644
--- a/oracle/CMakeLists.txt
+++ b/oracle/CMakeLists.txt
@@ -66,8 +66,6 @@ set(oracle_RESOURCES oracle.qrc)
 # ------------------------
 if(Qt6_FOUND)
   qt6_add_resources(oracle_RESOURCES_RCC ${oracle_RESOURCES})
-elseif(Qt5_FOUND)
-  qt5_add_resources(oracle_RESOURCES_RCC ${oracle_RESOURCES})
 endif()
 
 # ------------------------
@@ -117,25 +115,6 @@ if(Qt6_FOUND)
     ${oracle_MOC_SRCS}
     MANUAL_FINALIZATION
   )
-elseif(Qt5_FOUND)
-  # Qt5 Translations need to be linked at executable creation time
-  if(Qt5LinguistTools_FOUND)
-    if(UPDATE_TRANSLATIONS)
-      qt5_create_translation(oracle_QM ${translate_SRCS} ${oracle_TS})
-    else()
-      qt5_add_translation(oracle_QM ${oracle_TS})
-    endif()
-  endif()
-  add_executable(oracle WIN32 MACOSX_BUNDLE ${oracle_MOC_SRCS} ${oracle_QM} ${oracle_RESOURCES_RCC} ${oracle_SOURCES})
-  if(UNIX)
-    if(APPLE)
-      install(FILES ${oracle_QM} DESTINATION ${ORACLE_MAC_QM_INSTALL_DIR})
-    else()
-      install(FILES ${oracle_QM} DESTINATION ${ORACLE_UNIX_QM_INSTALL_DIR})
-    endif()
-  elseif(WIN32)
-    install(FILES ${oracle_QM} DESTINATION ${ORACLE_WIN32_QM_INSTALL_DIR})
-  endif()
 endif()
 
 # ------------------------
diff --git a/oracle/src/main.cpp b/oracle/src/main.cpp
index 5def0c887..27e5723c1 100644
--- a/oracle/src/main.cpp
+++ b/oracle/src/main.cpp
@@ -24,11 +24,7 @@ void installNewTranslator()
     QString lang = SettingsCache::instance().getLang();
 
     QString qtNameHint = "qt_" + lang;
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     QString qtTranslationPath = QLibraryInfo::path(QLibraryInfo::TranslationsPath);
-#else
-    QString qtTranslationPath = QLibraryInfo::location(QLibraryInfo::TranslationsPath);
-#endif
 
     bool qtTranslationLoaded = qtTranslator->load(qtNameHint, qtTranslationPath);
     if (!qtTranslationLoaded) {
diff --git a/oracle/src/qt-json/json.cpp b/oracle/src/qt-json/json.cpp
index 2fffd0f70..97a7048c2 100644
--- a/oracle/src/qt-json/json.cpp
+++ b/oracle/src/qt-json/json.cpp
@@ -109,12 +109,8 @@ QByteArray Json::serialize(const QVariant &data, bool &success)
     {
         str = "null";
     }
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     else if ((data.typeId() == QMetaType::Type::QVariantList) ||
              (data.typeId() == QMetaType::Type::QStringList)) // variant is a list?
-#else
-    else if ((data.type() == QVariant::List) || (data.type() == QVariant::StringList))  // variant is a list?
-#endif
     {
         QList<QByteArray> values;
         const QVariantList list = data.toList();
@@ -129,11 +125,7 @@ QByteArray Json::serialize(const QVariant &data, bool &success)
 
         str = "[ " + join(values, ", ") + " ]";
     }
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     else if ((data.typeId() == QMetaType::Type::QVariantHash)) // variant is a list?
-#else
-    else if (data.type() == QVariant::Hash)                                             // variant is a hash?
-#endif
     {
         const QVariantHash vhash = data.toHash();
         QHashIterator<QString, QVariant> it(vhash);
@@ -155,11 +147,7 @@ QByteArray Json::serialize(const QVariant &data, bool &success)
         str += join(pairs, ", ");
         str += " }";
     }
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     else if ((data.typeId() == QMetaType::Type::QVariantMap)) // variant is a list?
-#else
-    else if (data.type() == QVariant::Map)                                              // variant is a map?
-#endif
     {
         const QVariantMap vmap = data.toMap();
         QMapIterator<QString, QVariant> it(vmap);
@@ -177,39 +165,23 @@ QByteArray Json::serialize(const QVariant &data, bool &success)
         str += join(pairs, ", ");
         str += " }";
     }
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     else if ((data.typeId() == QMetaType::Type::QString) ||
              (data.typeId() == QMetaType::Type::QByteArray)) // variant is a list?
-#else
-    else if ((data.type() == QVariant::String) || (data.type() == QVariant::ByteArray)) // a string or a byte array?
-#endif
     {
         str = sanitizeString(data.toString()).toUtf8();
     }
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     else if (data.typeId() == QMetaType::Type::Double)
-#else
-    else if (data.type() == QVariant::Double)                                           // double?
-#endif
     {
         str = QByteArray::number(data.toDouble(), 'g', 20);
         if (!str.contains(".") && !str.contains("e")) {
             str += ".0";
         }
     }
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     else if (data.typeId() == QMetaType::Type::Bool)
-#else
-    else if (data.type() == QVariant::Bool)                                             // boolean value?
-#endif
     {
         str = data.toBool() ? "true" : "false";
     }
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     else if (data.typeId() == QMetaType::Type::ULongLong)
-#else
-    else if (data.type() == QVariant::ULongLong)                                        // large unsigned number?
-#endif
     {
         str = QByteArray::number(data.value<qulonglong>());
     } else if (data.canConvert<qlonglong>()) // any signed number?
diff --git a/servatrice/CMakeLists.txt b/servatrice/CMakeLists.txt
index 6e4191beb..e97a6156c 100644
--- a/servatrice/CMakeLists.txt
+++ b/servatrice/CMakeLists.txt
@@ -45,8 +45,6 @@ endif(APPLE)
 
 if(Qt6_FOUND)
   qt6_add_resources(servatrice_RESOURCES_RCC ${servatrice_RESOURCES})
-elseif(Qt5_FOUND)
-  qt5_add_resources(servatrice_RESOURCES_RCC ${servatrice_RESOURCES})
 endif()
 
 set(QT_DONT_USE_QTGUI TRUE)
diff --git a/servatrice/src/smtp/qxthmac.cpp b/servatrice/src/smtp/qxthmac.cpp
index 3b7489f72..744977a0c 100644
--- a/servatrice/src/smtp/qxthmac.cpp
+++ b/servatrice/src/smtp/qxthmac.cpp
@@ -167,11 +167,7 @@ bool QxtHmac::verify(const QByteArray& otherInner)
 void QxtHmac::addData(const char* data, int length)
 {
     Q_ASSERT(qxt_d().opad.size());
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 3, 0))
     qxt_d().ihash->addData(QByteArrayView(data, length));
-#else
-    qxt_d().ihash->addData(data, length);
-#endif
     qxt_d().result.clear();
 }
 
diff --git a/servatrice/src/smtp/qxtsmtp.cpp b/servatrice/src/smtp/qxtsmtp.cpp
index 6326b101d..c81e0955c 100644
--- a/servatrice/src/smtp/qxtsmtp.cpp
+++ b/servatrice/src/smtp/qxtsmtp.cpp
@@ -54,13 +54,8 @@ QxtSmtp::QxtSmtp(QObject *parent) : QObject(parent)
     // QObject::connect(socket(), SIGNAL(encrypted()), &qxt_d(), SLOT(ehlo()));
     QObject::connect(socket(), SIGNAL(connected()), this, SIGNAL(connected()));
     QObject::connect(socket(), SIGNAL(disconnected()), this, SIGNAL(disconnected()));
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
     QObject::connect(socket(), SIGNAL(errorOccurred(QAbstractSocket::SocketError)), &qxt_d(),
                      SLOT(socketError(QAbstractSocket::SocketError)));
-#else
-    QObject::connect(socket(), SIGNAL(error(QAbstractSocket::SocketError)), &qxt_d(),
-                     SLOT(socketError(QAbstractSocket::SocketError)));
-#endif
     QObject::connect(this, SIGNAL(authenticated()), &qxt_d(), SLOT(sendNext()));
     QObject::connect(socket(), SIGNAL(readyRead()), &qxt_d(), SLOT(socketRead()));
 }