diff --git a/README.md b/README.md
index 8987c12..6aef298 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,7 @@ GameHDR is a user-friendly tool that allows you to create custom shortcuts for y
 
 This enables HDR on your monitor only while playing specific games.
 
+**Note:** GameHDR is designed for Windows operating systems only. Tested for Windows 11 version 23H2.
 
 ## Features