diff --git a/pinpayments/models.py b/pinpayments/models.py
index 4634645..088c9c1 100644
--- a/pinpayments/models.py
+++ b/pinpayments/models.py
@@ -278,7 +278,7 @@ def process_transaction(self):
             data = response_json['response']
             self.succeeded = True
             self.transaction_token = data['token']
-            self.fees = data['total_fees'] / Decimal("100.00")
+            self.fees = data['total_fees'] / Decimal("100.00") if data['total_fees'] is not None else None
             self.pin_response = data['status_message']
             self.card_address1 = data['card']['address_line1']
             self.card_address2 = data['card']['address_line2']