diff --git a/cloudpayments/client.py b/cloudpayments/client.py
index 807d876..23d08b5 100644
--- a/cloudpayments/client.py
+++ b/cloudpayments/client.py
@@ -24,6 +24,7 @@ def _send_request(self, endpoint, params=None, request_id=None):
 
         response = requests.post(self.URL + endpoint, json=params, auth=auth, 
                                  headers=headers)
+        response.raise_for_status()
         return response.json(parse_float=decimal.Decimal)
 
     def test(self, request_id=None):