diff --git a/README.md b/README.md
index 56d3382..8499d94 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,8 @@ Add the "Sign in with Bluesquare Connect" button in your blade login page:
 <x-connect-button/>
 ```
 
+Make sure that your `password` is nullable.
+
 #### Keep user tokens (optional)
 
 First, make sure that your model implements `HasConnectTokens` trait.