diff --git a/sample/username_password_sample.py b/sample/username_password_sample.py
index 9c9b3c06..bcc8b7d5 100644
--- a/sample/username_password_sample.py
+++ b/sample/username_password_sample.py
@@ -38,7 +38,7 @@
     config["client_id"], authority=config["authority"],
     # token_cache=...  # Default cache is in memory only.
                        # You can learn how to use SerializableTokenCache from
-                       # https://msal-python.rtfd.io/en/latest/#msal.SerializableTokenCache
+                       # https://msal-python.readthedocs.io/en/latest/#msal.SerializableTokenCache
     )
 
 # The pattern to acquire a token looks like this.