diff --git a/.flake8 b/.flake8
index 5c92420..3f1d12a 100644
--- a/.flake8
+++ b/.flake8
@@ -1,5 +1,6 @@
 [flake8]
 max-line-length = 99
+ignore = E231
 exclude =   migrations,
             settings_local.py,
             manage.py,
diff --git a/tpay_module/views.py b/tpay_module/views.py
index f0b06a2..62acec8 100644
--- a/tpay_module/views.py
+++ b/tpay_module/views.py
@@ -44,8 +44,9 @@ def post(self, request, *args, **kwargs):  # noqa: D102
             payment_part = f'{payment.price.amount}{payment.number}'
             secure_code = getattr(settings, 'TPAY_SECURE_CODE', None)
             if secure_code:
+                id_part = data['id'] + data['tr_id']
                 probable_md5 = hashlib.md5(
-                    f'{data["id"]}{data["tr_id"]}{payment_part}{secure_code}'.encode('utf-8'),
+                    f'{id_part}{payment_part}{secure_code}'.encode('utf-8'),
                 ).hexdigest()
                 get_price = '{:.2f}'.format(float(request.POST['tr_paid']))  # noqa: P101
                 price_check = Decimal(get_price) == payment.price.amount