diff --git a/README.md b/README.md
index 94ff34a..eeca20f 100644
--- a/README.md
+++ b/README.md
@@ -105,7 +105,7 @@ git clone https://github.com/panr/hugo-theme-hello-friend.git themes/hello-frien
 If you don't want to make any radical changes, it's the best option, because you can get new updates when they are available. To do so, include it as a git submodule:
 
 ```bash
-git submodule add https://github.com/panr/hugo-theme-hello-friend.git themes/hello-friend
+git submodule add -f https://github.com/panr/hugo-theme-hello-friend.git themes/hello-friend
 ```
 
 ⚠️ **The theme needs at least Hugo version 0.74.x**.