diff --git a/apps/payment/models.py b/apps/payment/models.py
index 6cf3402a..4860b3c8 100644
--- a/apps/payment/models.py
+++ b/apps/payment/models.py
@@ -60,7 +60,7 @@ class AuthorBalance(models.Model):
                     author_balance=self,
                 )
                 self.declined_send_at = now()
-        super.save(*args, **kwargs)
+        super().save(*args, **kwargs)
 
     def calc_commission(self):
         return self.amount * config.SERVICE_COMMISSION / 100