diff --git a/.cmake.conf b/.cmake.conf
index 979edb2e37..151bdb539f 100644
--- a/.cmake.conf
+++ b/.cmake.conf
@@ -8,7 +8,7 @@ if (NOT DEFINED QT_SUPERBUILD OR DEFINED QT_REPO_MODULE_VERSION)
     list(APPEND QT_EXTRA_INTERNAL_TARGET_DEFINES "QT_NO_AS_CONST=1")
 endif()
 
-set(QT_REPO_MODULE_VERSION "6.5.0")
+set(QT_REPO_MODULE_VERSION "6.6.0")
 set(QT_REPO_MODULE_PRERELEASE_VERSION_SEGMENT "alpha1")
 
 # Minimum requirement for building Qt
diff --git a/src/corelib/serialization/qdatastream.cpp b/src/corelib/serialization/qdatastream.cpp
index ef404250b7..9372cb421f 100644
--- a/src/corelib/serialization/qdatastream.cpp
+++ b/src/corelib/serialization/qdatastream.cpp
@@ -525,6 +525,7 @@ void QDataStream::setByteOrder(ByteOrder bo)
     \value Qt_6_3 Same as Qt_6_0
     \value Qt_6_4 Same as Qt_6_0
     \value Qt_6_5 Same as Qt_6_0
+    \value Qt_6_6 Same as Qt_6_0
     \omitvalue Qt_DefaultCompiledVersion
 
     \sa setVersion(), version()
diff --git a/src/corelib/serialization/qdatastream.h b/src/corelib/serialization/qdatastream.h
index 8d89e4bb45..0942c3ed1d 100644
--- a/src/corelib/serialization/qdatastream.h
+++ b/src/corelib/serialization/qdatastream.h
@@ -68,8 +68,9 @@ public:
         Qt_6_3 = Qt_6_0,
         Qt_6_4 = Qt_6_0,
         Qt_6_5 = Qt_6_0,
-        Qt_DefaultCompiledVersion = Qt_6_5
-#if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)
+        Qt_6_6 = Qt_6_0,
+        Qt_DefaultCompiledVersion = Qt_6_6
+#if QT_VERSION >= QT_VERSION_CHECK(6, 7, 0)
 #error Add the datastream version for this Qt version and update Qt_DefaultCompiledVersion
 #endif
     };
diff --git a/src/plugins/sqldrivers/.cmake.conf b/src/plugins/sqldrivers/.cmake.conf
index 377be0059e..146dd2bd5a 100644
--- a/src/plugins/sqldrivers/.cmake.conf
+++ b/src/plugins/sqldrivers/.cmake.conf
@@ -1 +1 @@
-set(QT_REPO_MODULE_VERSION "6.5.0")
+set(QT_REPO_MODULE_VERSION "6.6.0")
diff --git a/tests/auto/cmake/mockplugins/.cmake.conf b/tests/auto/cmake/mockplugins/.cmake.conf
index edb49ceeb2..473e7ea8e4 100644
--- a/tests/auto/cmake/mockplugins/.cmake.conf
+++ b/tests/auto/cmake/mockplugins/.cmake.conf
@@ -1,3 +1,3 @@
-set(QT_REPO_MODULE_VERSION "6.5.0")
+set(QT_REPO_MODULE_VERSION "6.6.0")
 
 set(QT_USE_SYNCQT_CPP TRUE)
diff --git a/tests/auto/cmake/test_generating_cpp_exports/.cmake.conf b/tests/auto/cmake/test_generating_cpp_exports/.cmake.conf
index 377be0059e..146dd2bd5a 100644
--- a/tests/auto/cmake/test_generating_cpp_exports/.cmake.conf
+++ b/tests/auto/cmake/test_generating_cpp_exports/.cmake.conf
@@ -1 +1 @@
-set(QT_REPO_MODULE_VERSION "6.5.0")
+set(QT_REPO_MODULE_VERSION "6.6.0")
diff --git a/tests/auto/cmake/test_static_resources/.cmake.conf b/tests/auto/cmake/test_static_resources/.cmake.conf
index 377be0059e..146dd2bd5a 100644
--- a/tests/auto/cmake/test_static_resources/.cmake.conf
+++ b/tests/auto/cmake/test_static_resources/.cmake.conf
@@ -1 +1 @@
-set(QT_REPO_MODULE_VERSION "6.5.0")
+set(QT_REPO_MODULE_VERSION "6.6.0")
diff --git a/util/cmake/pro2cmake.py b/util/cmake/pro2cmake.py
index 086a70146e..487a57abd6 100755
--- a/util/cmake/pro2cmake.py
+++ b/util/cmake/pro2cmake.py
@@ -4666,7 +4666,7 @@ def create_top_level_cmake_conf():
     conf_file_name = ".cmake.conf"
     try:
         with open(conf_file_name, "x") as file:
-            file.write('set(QT_REPO_MODULE_VERSION "6.5.0")\n')
+            file.write('set(QT_REPO_MODULE_VERSION "6.6.0")\n')
     except FileExistsError:
         pass