diff --git a/cockatrice/src/interface/layouts/overlap_layout.h b/cockatrice/src/interface/layouts/overlap_layout.h
index 32c74c18a..c61df6fbc 100644
--- a/cockatrice/src/interface/layouts/overlap_layout.h
+++ b/cockatrice/src/interface/layouts/overlap_layout.h
@@ -27,7 +27,7 @@ public:
                   int maxRows = 2,
                   Qt::Orientation overlapDirection = Qt::Vertical,
                   Qt::Orientation flowDirection = Qt::Horizontal);
-    ~OverlapLayout();
+    ~OverlapLayout() override;
     void insertWidgetAtIndex(QWidget *toInsert, int index);
 
     void addItem(QLayoutItem *item) override;
diff --git a/cockatrice/src/interface/palette_editor/palette_grid_widget.h b/cockatrice/src/interface/palette_editor/palette_grid_widget.h
index 7c527a064..250e977e3 100644
--- a/cockatrice/src/interface/palette_editor/palette_grid_widget.h
+++ b/cockatrice/src/interface/palette_editor/palette_grid_widget.h
@@ -31,7 +31,7 @@ signals:
 
 private:
     void buildGrid(QWidget *host);
-    void changeEvent(QEvent *e);
+    void changeEvent(QEvent *e) override;
     void refreshChromePalettes();
 
 private slots:
diff --git a/cockatrice/src/interface/widgets/deck_analytics/analyzer_modules/mana_curve/mana_curve_total_widget.h b/cockatrice/src/interface/widgets/deck_analytics/analyzer_modules/mana_curve/mana_curve_total_widget.h
index 0eaecec96..d76c5bfc6 100644
--- a/cockatrice/src/interface/widgets/deck_analytics/analyzer_modules/mana_curve/mana_curve_total_widget.h
+++ b/cockatrice/src/interface/widgets/deck_analytics/analyzer_modules/mana_curve/mana_curve_total_widget.h
@@ -17,8 +17,8 @@ class ManaCurveTotalWidget : public QWidget
 
 public:
     explicit ManaCurveTotalWidget(QWidget *parent);
-    QSize sizeHint() const;
-    QSize minimumSizeHint() const;
+    QSize sizeHint() const override;
+    QSize minimumSizeHint() const override;
     void updateDisplay(const QString &categoryName,
                        int minCmc,
                        int maxCmc,
diff --git a/cockatrice/src/interface/widgets/general/display/dynamic_font_size_label.h b/cockatrice/src/interface/widgets/general/display/dynamic_font_size_label.h
index 189ca4324..f39c12edb 100644
--- a/cockatrice/src/interface/widgets/general/display/dynamic_font_size_label.h
+++ b/cockatrice/src/interface/widgets/general/display/dynamic_font_size_label.h
@@ -23,7 +23,7 @@ class DynamicFontSizeLabel : public QLabel
 public:
     explicit DynamicFontSizeLabel(QWidget *parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
 
-    ~DynamicFontSizeLabel()
+    ~DynamicFontSizeLabel() override
     {
     }
 
@@ -37,17 +37,17 @@ signals:
     void clicked();
 
 protected:
-    void mousePressEvent(QMouseEvent *event);
+    void mousePressEvent(QMouseEvent *event) override;
     QColor textColor;
 
     // QWidget interface
 protected:
-    void paintEvent(QPaintEvent *event);
+    void paintEvent(QPaintEvent *event) override;
 
     // QWidget interface
 public:
-    QSize minimumSizeHint() const;
-    QSize sizeHint() const;
+    QSize minimumSizeHint() const override;
+    QSize sizeHint() const override;
 };
 
 #endif // DYNAMICFONTSIZELABEL_H
\ No newline at end of file
diff --git a/cockatrice/src/interface/widgets/general/display/dynamic_font_size_push_button.h b/cockatrice/src/interface/widgets/general/display/dynamic_font_size_push_button.h
index b8b8e51bb..51f1e455f 100644
--- a/cockatrice/src/interface/widgets/general/display/dynamic_font_size_push_button.h
+++ b/cockatrice/src/interface/widgets/general/display/dynamic_font_size_push_button.h
@@ -25,11 +25,11 @@ public:
     void setTextAndColor(const QString &text, QColor color = QColor::Invalid);
 
     // QWidget interface
-    QSize minimumSizeHint() const;
-    QSize sizeHint() const;
+    QSize minimumSizeHint() const override;
+    QSize sizeHint() const override;
 
 protected:
-    void paintEvent(QPaintEvent *event);
+    void paintEvent(QPaintEvent *event) override;
 
 private:
     QColor textColor;
diff --git a/cockatrice/src/interface/widgets/tabs/abstract_tab_deck_editor.h b/cockatrice/src/interface/widgets/tabs/abstract_tab_deck_editor.h
index 1782e7afd..1212bcc88 100644
--- a/cockatrice/src/interface/widgets/tabs/abstract_tab_deck_editor.h
+++ b/cockatrice/src/interface/widgets/tabs/abstract_tab_deck_editor.h
@@ -90,13 +90,13 @@ public:
     virtual void createMenus() = 0;
 
     /** @brief Returns the display text for the tab. */
-    [[nodiscard]] virtual QString getTabText() const override = 0;
+    [[nodiscard]] QString getTabText() const override = 0;
 
     /** @brief Confirms whether the tab can be safely closed. */
     bool confirmClose();
 
     /** @brief Retranslates the UI text. Pure virtual. */
-    virtual void retranslateUi() override = 0;
+    void retranslateUi() override = 0;
 
     /** @brief Opens a deck in this tab.
      *  @param deck The deck to open
diff --git a/cockatrice/src/interface/widgets/visual_database_display/visual_database_filter_display_widget.h b/cockatrice/src/interface/widgets/visual_database_display/visual_database_filter_display_widget.h
index 6d051bcf7..3857b5bfd 100644
--- a/cockatrice/src/interface/widgets/visual_database_display/visual_database_filter_display_widget.h
+++ b/cockatrice/src/interface/widgets/visual_database_display/visual_database_filter_display_widget.h
@@ -20,7 +20,7 @@ class FilterDisplayWidget : public QWidget
 
 public:
     explicit FilterDisplayWidget(QWidget *parent, const QString &filename, FilterTreeModel *_filterModel);
-    ~FilterDisplayWidget() = default;
+    ~FilterDisplayWidget() override = default;
 
     QSize sizeHint() const override;
 
diff --git a/libcockatrice_deck_list/libcockatrice/deck_list/tree/abstract_deck_list_card_node.h b/libcockatrice_deck_list/libcockatrice/deck_list/tree/abstract_deck_list_card_node.h
index ebfd9a0b6..03898bd20 100644
--- a/libcockatrice_deck_list/libcockatrice/deck_list/tree/abstract_deck_list_card_node.h
+++ b/libcockatrice_deck_list/libcockatrice/deck_list/tree/abstract_deck_list_card_node.h
@@ -75,19 +75,19 @@ public:
     virtual void setName(const QString &_name) = 0;
 
     /** @return The provider identifier for this card (e.g., UUID). */
-    [[nodiscard]] virtual QString getCardProviderId() const override = 0;
+    [[nodiscard]] QString getCardProviderId() const override = 0;
 
     /** @param _cardProviderId Set the provider identifier for this card. */
     virtual void setCardProviderId(const QString &_cardProviderId) = 0;
 
     /** @return The abbreviated set code (e.g., "NEO"). */
-    [[nodiscard]] virtual QString getCardSetShortName() const override = 0;
+    [[nodiscard]] QString getCardSetShortName() const override = 0;
 
     /** @param _cardSetShortName Set the abbreviated set code. */
     virtual void setCardSetShortName(const QString &_cardSetShortName) = 0;
 
     /** @return The collector number of the card within its set. */
-    [[nodiscard]] virtual QString getCardCollectorNumber() const override = 0;
+    [[nodiscard]] QString getCardCollectorNumber() const override = 0;
 
     /** @param _cardSetNumber Set the collector number. */
     virtual void setCardCollectorNumber(const QString &_cardSetNumber) = 0;
diff --git a/libcockatrice_models/libcockatrice/models/database/card_set/card_sets_model.h b/libcockatrice_models/libcockatrice/models/database/card_set/card_sets_model.h
index 17eab6c53..79ae30b13 100644
--- a/libcockatrice_models/libcockatrice/models/database/card_set/card_sets_model.h
+++ b/libcockatrice_models/libcockatrice/models/database/card_set/card_sets_model.h
@@ -41,7 +41,7 @@ public:
     {
         return oldRow;
     }
-    [[nodiscard]] QStringList formats() const
+    [[nodiscard]] QStringList formats() const override
     {
         return QStringList() << "application/x-cockatricecardset";
     }
diff --git a/libcockatrice_network/libcockatrice/network/server/remote/game/server_abstract_player.h b/libcockatrice_network/libcockatrice/network/server/remote/game/server_abstract_player.h
index c92c4c3dd..a5714f25e 100644
--- a/libcockatrice_network/libcockatrice/network/server/remote/game/server_abstract_player.h
+++ b/libcockatrice_network/libcockatrice/network/server/remote/game/server_abstract_player.h
@@ -145,7 +145,7 @@ public:
                                              const QString &attrValue,
                                              Server_Card *unzonedCard = nullptr);
 
-    virtual Response::ResponseCode
+    Response::ResponseCode
     cmdConcede(const Command_Concede &cmd, ResponseContainer &rc, GameEventStorage &ges) override;
     virtual Response::ResponseCode
     cmdUnconcede(const Command_Unconcede &cmd, ResponseContainer &rc, GameEventStorage &ges) override;
@@ -177,14 +177,14 @@ public:
     cmdRevealCards(const Command_RevealCards &cmd, ResponseContainer &rc, GameEventStorage &ges) override;
     Response::ResponseCode
     cmdRevealRandomCards(const Command_RevealRandomCards &cmd, ResponseContainer &rc, GameEventStorage &ges) override;
-    virtual Response::ResponseCode cmdChangeZoneProperties(const Command_ChangeZoneProperties &cmd,
-                                                           ResponseContainer &rc,
-                                                           GameEventStorage &ges) override;
+    Response::ResponseCode cmdChangeZoneProperties(const Command_ChangeZoneProperties &cmd,
+                                                   ResponseContainer &rc,
+                                                   GameEventStorage &ges) override;
 
-    virtual void getInfo(ServerInfo_Player *info,
-                         Server_AbstractParticipant *playerWhosAsking,
-                         bool omniscient,
-                         bool withUserInfo) override;
+    void getInfo(ServerInfo_Player *info,
+                 Server_AbstractParticipant *playerWhosAsking,
+                 bool omniscient,
+                 bool withUserInfo) override;
 };
 
 #endif
diff --git a/libcockatrice_network/libcockatrice/network/server/remote/server_protocolhandler.h b/libcockatrice_network/libcockatrice/network/server/remote/server_protocolhandler.h
index 636bb4771..0a20cca13 100644
--- a/libcockatrice_network/libcockatrice/network/server/remote/server_protocolhandler.h
+++ b/libcockatrice_network/libcockatrice/network/server/remote/server_protocolhandler.h
@@ -129,7 +129,7 @@ public slots:
 
 public:
     Server_ProtocolHandler(Server *_server, Server_DatabaseInterface *_databaseInterface, QObject *parent = nullptr);
-    ~Server_ProtocolHandler();
+    ~Server_ProtocolHandler() override;
 
     bool getAcceptsUserListChanges() const
     {
@@ -153,17 +153,17 @@ public:
     /** @brief Invalidate the pending nonce (single-use). */
     void clearAuthNonce();
 
-    int getLastCommandTime() const
+    int getLastCommandTime() const override
     {
         return timeRunning - lastDataReceived;
     }
-    bool addSaidMessageSize(int size);
+    bool addSaidMessageSize(int size) override;
     virtual void processCommandContainer(const CommandContainer &cont);
 
-    void sendProtocolItem(const Response &item);
-    void sendProtocolItem(const SessionEvent &item);
-    void sendProtocolItem(const GameEventContainer &item);
-    void sendProtocolItem(const RoomEvent &item);
+    void sendProtocolItem(const Response &item) override;
+    void sendProtocolItem(const SessionEvent &item) override;
+    void sendProtocolItem(const GameEventContainer &item) override;
+    void sendProtocolItem(const RoomEvent &item) override;
 };
 
 #endif
diff --git a/libcockatrice_network/libcockatrice/network/server/remote/server_remoteuserinterface.h b/libcockatrice_network/libcockatrice/network/server/remote/server_remoteuserinterface.h
index 3bdf04220..2c96b8809 100644
--- a/libcockatrice_network/libcockatrice/network/server/remote/server_remoteuserinterface.h
+++ b/libcockatrice_network/libcockatrice/network/server/remote/server_remoteuserinterface.h
@@ -14,19 +14,19 @@ public:
     {
     }
 
-    int getLastCommandTime() const
+    int getLastCommandTime() const override
     {
         return 0;
     }
-    bool addSaidMessageSize(int /*size*/)
+    bool addSaidMessageSize(int /*size*/) override
     {
         return true;
     }
 
-    void sendProtocolItem(const Response &item);
-    void sendProtocolItem(const SessionEvent &item);
-    void sendProtocolItem(const GameEventContainer &item);
-    void sendProtocolItem(const RoomEvent &item);
+    void sendProtocolItem(const Response &item) override;
+    void sendProtocolItem(const SessionEvent &item) override;
+    void sendProtocolItem(const GameEventContainer &item) override;
+    void sendProtocolItem(const RoomEvent &item) override;
 };
 
 #endif