diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2fa1d13580..a2cfa3771c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ project(KWin)
 set(PROJECT_VERSION "5.19.80")
 set(PROJECT_VERSION_MAJOR 5)
 
-set(QT_MIN_VERSION "5.14.0")
+set(QT_MIN_VERSION "5.15.0")
 set(KF5_MIN_VERSION "5.74")
 
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})