diff --git a/aggregator/models.py b/aggregator/models.py
index 71b790e..831cfb4 100644
--- a/aggregator/models.py
+++ b/aggregator/models.py
@@ -49,8 +49,7 @@ class Chat(models.Model):
                 obj.photo_id = chat.photo.small_file_id
                 obj.save()
         if created:
-            transaction.commit()
-            collect_new_messages.delay(obj.pk)
+            transaction.on_commit(lambda: collect_new_messages.delay(obj.pk))
         return obj
 
     def __str__(self):