diff --git a/authens/backends.py b/authens/backends.py
index 6698414..b15561d 100644
--- a/authens/backends.py
+++ b/authens/backends.py
@@ -2,8 +2,8 @@ from django.contrib.auth import get_user_model
 from django.db import transaction
 
 from authens.models import CASAccount, OldCASAccount
-from authens.utils import get_cas_client, parse_entrance_year
 from authens.signals import post_cas_connect
+from authens.utils import get_cas_client, parse_entrance_year
 
 UserModel = get_user_model()