diff --git a/zproject/backends.py b/zproject/backends.py
index c5cfd85f5f..9f888602c5 100644
--- a/zproject/backends.py
+++ b/zproject/backends.py
@@ -101,7 +101,7 @@ def common_get_active_user_by_email(email, return_data=None):
         return None
     return user_profile
 
-class ZulipAuthMixin(object):
+class ZulipAuthMixin:
     def get_user(self, user_profile_id):
         # type: (int) -> Optional[UserProfile]
         """ Get a UserProfile object from the user_profile_id. """