diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1cf4ac7..d5a687d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,7 +8,7 @@ set(CMAKE_AUTORCC ON)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CXX_FLAGS "-Wall -Wextra -Wpedantic -Wuseless-cast -Wconversion -Wsign-conversion -Wshadow")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wpedantic -Wuseless-cast -Wconversion -Wsign-conversion -Wshadow")
 
 if(NOT DEFINED QT_VERSION_MAJOR)
     set(QT_VERSION_MAJOR 6)