diff --git a/setup.py b/setup.py
index 2282056..dc6a81a 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
     shuup_setup_utils = None
 
 
-VERSION = '0.5.0'
+VERSION = '0.5.1'
 
 TOPDIR = os.path.abspath(os.path.dirname(__file__))
 VERSION_FILE = os.path.join(TOPDIR, 'shuup_checkoutfi', '_version.py')
diff --git a/shuup_checkoutfi/migrations/0002_update_managers.py b/shuup_checkoutfi/migrations/0002_update_managers.py
new file mode 100644
index 0000000..d6d003a
--- /dev/null
+++ b/shuup_checkoutfi/migrations/0002_update_managers.py
@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.9 on 2016-09-22 23:00
+from __future__ import unicode_literals
+
+from django.db import migrations
+import django.db.models.manager
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('shuup_checkoutfi', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='checkoutfipaymentprocessor',
+            options={'verbose_name': 'Checkout.fi payment processor'},
+        ),
+        migrations.AlterModelManagers(
+            name='checkoutfipaymentprocessor',
+            managers=[
+                ('_default_manager', django.db.models.manager.Manager()),
+            ],
+        ),
+    ]
diff --git a/shuup_checkoutfi/models.py b/shuup_checkoutfi/models.py
index 1e0821a..ee62883 100644
--- a/shuup_checkoutfi/models.py
+++ b/shuup_checkoutfi/models.py
@@ -57,13 +57,13 @@ def _get_checkout_object(self, service):
     def process_payment_return_request(self, service, order, request):
         checkout = self._get_checkout_object(service)
         fields = {
-            "version": request.REQUEST.get("VERSION"),
-            "order_number": request.REQUEST.get("STAMP"),
-            "order_reference": request.REQUEST.get("REFERENCE"),
-            "payment": request.REQUEST.get("PAYMENT"),
-            "status": request.REQUEST.get("STATUS"),
-            "algorithm": request.REQUEST.get("ALGORITHM"),
-            "mac": request.REQUEST.get("MAC"),
+            "version": request.GET.get("VERSION"),
+            "order_number": request.GET.get("STAMP"),
+            "order_reference": request.GET.get("REFERENCE"),
+            "payment": request.GET.get("PAYMENT"),
+            "status": request.GET.get("STATUS"),
+            "algorithm": request.GET.get("ALGORITHM"),
+            "mac": request.GET.get("MAC"),
         }
 
         if not all(fields.values()):