diff --git a/domain_admin/api/notify_api.py b/domain_admin/api/notify_api.py
index 539a0aa79d..e2982bb018 100644
--- a/domain_admin/api/notify_api.py
+++ b/domain_admin/api/notify_api.py
@@ -86,7 +86,6 @@ def get_notify_list_of_user():
             ]
         ), rows))
 
-
         group_ids = []
         for row in lst:
             group_ids.extend(row['groups'])
diff --git a/domain_admin/model/notify_model.py b/domain_admin/model/notify_model.py
index 812c45e4b7..180ad41da7 100644
--- a/domain_admin/model/notify_model.py
+++ b/domain_admin/model/notify_model.py
@@ -66,7 +66,7 @@ def groups(self):
         if self.groups_raw:
             return json.loads(self.groups_raw)
         else:
-            return None
+            return []
 
     # email参数
     @property