diff --git a/CMakeLists.txt b/CMakeLists.txt
index f84b551..c4c8d50 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -27,7 +27,13 @@ endif()
 
 if(MSVC)
     add_compile_definitions(SDL_MAIN_HANDLED)
-    add_compile_options(/W4 /WX)
+    add_compile_options(/WX)
+    # replace existing /W to avoid warning
+    if(CMAKE_CXX_FLAGS MATCHES "/W[0-4]")
+        string(REGEX REPLACE "/W[0-4]" "/W4" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
+    else()
+        add_compile_options(/W4)
+    endif()
 else()
     add_compile_options(-Wall -Wextra -Wpedantic -Werror)
 endif()
@@ -98,4 +104,4 @@ if(IMNODES_EXAMPLES)
     else()
         target_link_libraries(hello X11 Xext GL)
     endif()
-endif()
\ No newline at end of file
+endif()