diff --git a/combo/apps/newsletters/models.py b/combo/apps/newsletters/models.py
index ab26d5fd..153c4b09 100644
--- a/combo/apps/newsletters/models.py
+++ b/combo/apps/newsletters/models.py
@@ -123,8 +123,8 @@ class NewslettersCell(CellBase):
         endpoint = self.url + 'newsletters/'
         url = get_signed_url(endpoint, self.url, **kwargs)
         response = requests.get(url)
-        json_response = response.json()
-        if json_response['err'] == 0:
+        if response.ok:
+            json_response = response.json()
             return self.filter_data(json_response['data'])
         return []
 
@@ -132,8 +132,8 @@ class NewslettersCell(CellBase):
         endpoint = self.url + 'subscriptions/'
         url = get_signed_url(endpoint, self.url, **kwargs)
         response = requests.get(url)
-        json_response = response.json()
-        if json_response['err'] == 0:
+        if response.ok:
+            json_response = response.json()
             return self.filter_data(json_response['data'])
         return []
 
diff --git a/tests/test_newsletters_cell.py b/tests/test_newsletters_cell.py
index aba122b1..d5e74bc7 100644
--- a/tests/test_newsletters_cell.py
+++ b/tests/test_newsletters_cell.py
@@ -158,13 +158,17 @@ def mocked_requests_get(*args, **kwargs):
     class MockResponse:
         def __init__(self, json_data):
             self.json_data = json_data
+
+        def ok(self):
+            return True
+
         def json(self):
             return self.json_data
 
     if 'newsletters' in url:
-        return MockResponse({'err': 0, 'data': NEWSLETTERS})
+        return MockResponse({'data': NEWSLETTERS})
     else:
-        return MockResponse({'err': 0, 'data': SUBSCRIPTIONS})
+        return MockResponse({'data': SUBSCRIPTIONS})
 
 @mock.patch('combo.apps.newsletters.models.requests.get',
             side_effect=mocked_requests_get)