diff --git a/event_track_calendar_event/models/event_registration.py b/event_track_calendar_event/models/event_registration.py
index f6d4b62..82df4c9 100644
--- a/event_track_calendar_event/models/event_registration.py
+++ b/event_track_calendar_event/models/event_registration.py
@@ -8,7 +8,7 @@ class EventRegistration(models.Model):
     
     def write(self, vals):
         _logger.warning("call write...")
-        res = super().write(vals)       
+        res = super(EventRegistration,self).write(vals)       
         _logger.warning("Super Write OK") 
         for registration in self:
             for track in registration.event_id.track_ids: