diff --git a/api/v1/views.py b/api/v1/views.py
index b942720c..f792972b 100644
--- a/api/v1/views.py
+++ b/api/v1/views.py
@@ -109,7 +109,7 @@ class AuthorBalanceViewSet(ExtendedModelViewSet):
         author_id = request.data.get('author_id')
         amount = request.data.get('amount')
         card = request.data.get('card')
-        if not all([author_id, amount, card]):
+        if not all([author_id, amount,]):
             return Response(status=status.HTTP_400_BAD_REQUEST)
         AuthorBalance.objects.create(
             author_id=author_id,