diff --git a/helpers/models.py b/helpers/models.py
index 4bb86a0..83cfc50 100644
--- a/helpers/models.py
+++ b/helpers/models.py
@@ -33,5 +33,5 @@ class UserSchema(USchema):
 
     def load(self, entity, *args, **kwargs):
         if 'next_daily_notify_time' in entity:
-            entity['next_daily_notify_time'] = str(entity['next_daily_notify_time'])
+            entity['next_daily_notify_time'] = entity['next_daily_notify_time'].strftime("%Y-%m-%dT%H:%M:00.000+00:00")
         return super().load(entity, *args, **kwargs)