diff --git a/ssoauth/apps.py b/ssoauth/apps.py
index 5c84b832c9ed8bf0c450781d0957f5208d50251c..12c3ed40ed56c39f492b6f84fc82eed9efc13752 100644
--- a/ssoauth/apps.py
+++ b/ssoauth/apps.py
@@ -22,7 +22,7 @@ class SSOAuthConfig(AppConfig):
             else:
                 logger.warning(msg)
         # default groups
-        post_migrate.connect(self.post_migrate_callback, sender=type(self))
+        post_migrate.connect(self.post_migrate_callback, sender=self)
 
     @staticmethod
     def post_migrate_callback(*args, **kwargs):