diff --git a/README.md b/README.md
index 8628943f..c8bcfd7b 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,9 @@ Use this as a reference to build your own component libraries.
 
 ## Installation 🚀
 
+> [!NOTE]
+> RubyUI 1.0 requires Ruby 3.3.1 or later
+
 ### 1. Install the gem
 
 ```bash