diff --git a/libcockatrice_card/libcockatrice/card/card_info.cpp b/libcockatrice_card/libcockatrice/card/card_info.cpp
index ae7d8a0a9..8d08b53de 100644
--- a/libcockatrice_card/libcockatrice/card/card_info.cpp
+++ b/libcockatrice_card/libcockatrice/card/card_info.cpp
@@ -28,7 +28,7 @@ QByteArray serializeProperties(const QVariantHash &props)
 {
     QByteArray blob;
     QDataStream out(&blob, QIODevice::WriteOnly);
-    out.setVersion(QDataStream::Qt_6_5);
+    out.setVersion(QDataStream::Qt_6_3);
     out << props;
     return blob;
 }
@@ -42,7 +42,7 @@ void CardInfo::ensurePropertiesLoaded() const
     }
     if (!propertiesBlob.isEmpty()) {
         QDataStream in(propertiesBlob);
-        in.setVersion(QDataStream::Qt_6_5);
+        in.setVersion(QDataStream::Qt_6_3);
         in >> propertiesCache;
     }
     propertiesLoaded = true;
diff --git a/libcockatrice_card/libcockatrice/card/database/card_database_cache.cpp b/libcockatrice_card/libcockatrice/card/database/card_database_cache.cpp
index 1a9ff42d9..607bc37dd 100644
--- a/libcockatrice_card/libcockatrice/card/database/card_database_cache.cpp
+++ b/libcockatrice_card/libcockatrice/card/database/card_database_cache.cpp
@@ -40,7 +40,7 @@ void writeHashBlob(QDataStream &out, const QVariantHash &h)
 {
     QByteArray blob;
     QDataStream blobOut(&blob, QIODevice::WriteOnly);
-    blobOut.setVersion(QDataStream::Qt_6_5);
+    blobOut.setVersion(QDataStream::Qt_6_3);
     blobOut << h;
     out << static_cast<quint32>(blob.size());
     out.writeRawData(blob.constData(), blob.size());
@@ -329,7 +329,7 @@ bool CardDatabaseCache::write(const QString &cachePath, const CardDatabaseData &
     }
 
     QDataStream out(&file);
-    out.setVersion(QDataStream::Qt_6_5);
+    out.setVersion(QDataStream::Qt_6_3);
 
     // Header
     out << CACHE_MAGIC;
@@ -379,7 +379,7 @@ bool CardDatabaseCache::read(const QString &cachePath,
     QBuffer buffer(const_cast<QByteArray *>(&raw));
     buffer.open(QIODevice::ReadOnly);
     QDataStream in(&buffer);
-    in.setVersion(QDataStream::Qt_6_5);
+    in.setVersion(QDataStream::Qt_6_3);
 
     quint32 magic = 0;
     quint32 version = 0;
diff --git a/libcockatrice_card/libcockatrice/card/printing/printing_info.cpp b/libcockatrice_card/libcockatrice/card/printing/printing_info.cpp
index c45f897d6..ece52e7bf 100644
--- a/libcockatrice_card/libcockatrice/card/printing/printing_info.cpp
+++ b/libcockatrice_card/libcockatrice/card/printing/printing_info.cpp
@@ -17,7 +17,7 @@ void PrintingInfo::ensurePropertiesLoaded() const
     propertiesCache.clear();
     if (!propertiesBlob.isEmpty()) {
         QDataStream in(propertiesBlob);
-        in.setVersion(QDataStream::Qt_6_5);
+        in.setVersion(QDataStream::Qt_6_3);
         in >> propertiesCache;
     }
     propertiesLoaded = true;