diff --git a/GIT_SUBMODULE.md b/GIT_SUBMODULE.md
index 8f64f5d..9b18dc5 100644
--- a/GIT_SUBMODULE.md
+++ b/GIT_SUBMODULE.md
@@ -36,7 +36,7 @@ If it is, remove it from the index
 git rm --cached systems/chat_ui
 
 If system/chat_ui exits, remote it(chat_ui)
-rm -rf systems/chat_ui
+rm -r systems/chat_ui
 
 Add the submodule
 git submodule add https://github.com/example/repo.git systems/chat_ui