diff --git a/CMakeLists.txt b/CMakeLists.txt
index 408fec2..ae1b143 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,23 +10,25 @@ add_library(${PROJECT_NAME} STATIC
 )
 add_library(${PROJECT_NAME}::${PROJECT_NAME} ALIAS ${PROJECT_NAME})
 
-set(QT_MAJOR_VERSION 5 CACHE STRING "Qt version to use (5 or 6), defaults to 5")
+if(NOT QT_DEFAULT_MAJOR_VERSION)
+    set(QT_DEFAULT_MAJOR_VERSION 5 CACHE STRING "Qt version to use (5 or 6), defaults to 5")
+endif()
 
 # Find dependencies
 set(QT_COMPONENTS Core Network)
-set(QT_LIBRARIES Qt${QT_MAJOR_VERSION}::Core Qt${QT_MAJOR_VERSION}::Network)
+set(QT_LIBRARIES Qt${QT_DEFAULT_MAJOR_VERSION}::Core Qt${QT_DEFAULT_MAJOR_VERSION}::Network)
 
 if(QAPPLICATION_CLASS STREQUAL QApplication)
     list(APPEND QT_COMPONENTS Widgets)
-    list(APPEND QT_LIBRARIES Qt${QT_MAJOR_VERSION}::Widgets)
+    list(APPEND QT_LIBRARIES Qt${QT_DEFAULT_MAJOR_VERSION}::Widgets)
 elseif(QAPPLICATION_CLASS STREQUAL QGuiApplication)
     list(APPEND QT_COMPONENTS Gui)
-    list(APPEND QT_LIBRARIES Qt${QT_MAJOR_VERSION}::Gui)
+    list(APPEND QT_LIBRARIES Qt${QT_DEFAULT_MAJOR_VERSION}::Gui)
 else()
     set(QAPPLICATION_CLASS QCoreApplication)
 endif()
 
-find_package(Qt${QT_MAJOR_VERSION} COMPONENTS ${QT_COMPONENTS} REQUIRED)
+find_package(Qt${QT_DEFAULT_MAJOR_VERSION} COMPONENTS ${QT_COMPONENTS} REQUIRED)
 
 target_link_libraries(${PROJECT_NAME} PUBLIC ${QT_LIBRARIES})