diff --git a/README.md b/README.md
index 37a0b5d..eb9954f 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ Stack-chan / ｽﾀｯｸﾁｬﾝ.
 
 ## Software
 
+- [Stack-chan meets Scratch with M5bitLess](https://protopedia.net/prototype/4957) - Scratch interaction project using M5bitLess.
 ## AI / Conversation
 
 ## Mods