diff --git a/apps/kassa/utils.py b/apps/kassa/utils.py
index fadbe09..a46f08b 100644
--- a/apps/kassa/utils.py
+++ b/apps/kassa/utils.py
@@ -79,8 +79,8 @@ def update_card(card_number, user_id=None, order_uuid=None, transaction_id=None)
     payload = {
         'member_card': card_number,
         'user': user_id,
-        'order': str(order_uuid),
-        'transaction_id': str(transaction_id),
+        'order': order_uuid,
+        'transaction_id': str(transaction_id) if transaction_id else None,
     }
     return requests.patch(url, json=payload, headers=galtinn_auth)
 
diff --git a/apps/kassa/views.py b/apps/kassa/views.py
index a7668e6..77178e2 100644
--- a/apps/kassa/views.py
+++ b/apps/kassa/views.py
@@ -112,8 +112,8 @@ def register_card_and_membership(request):
                                    user_id=user_id)
         elif action == 'sms_card_notify' and order_uuid:
             response = update_card(card_number,
-                                   order_uuid=str(order_uuid),
-                                   transaction_id=str(transaction_id))
+                                   order_uuid=order_uuid,
+                                   transaction_id=transaction_id)
         else:
             assert user_id or order_uuid
         if response.status_code != 200: