diff --git a/QXlsx/CMakeLists.txt b/QXlsx/CMakeLists.txt
index d82b479f..527866ce 100644
--- a/QXlsx/CMakeLists.txt
+++ b/QXlsx/CMakeLists.txt
@@ -11,14 +11,18 @@ set(CMAKE_INCLUDE_CURRENT_DIR ON)
 
 set(CMAKE_AUTOMOC ON)
 
-set(CMAKE_CXX_STANDARD 11)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
 include(GNUInstallDirs)
 
 find_package(QT NAMES Qt6 Qt5 COMPONENTS Core Gui REQUIRED)
 find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Core Gui REQUIRED)
 
+if (QT_MAJOR_VERSION EQUAL 6)
+    set(CMAKE_CXX_STANDARD 17)
+else()
+    set(CMAKE_CXX_STANDARD 11)
+endif()
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules)
 
 if(NOT DEFINED ${QXLSX_PARENTPATH})