diff --git a/authorizenet/apicontrollersbase.py b/authorizenet/apicontrollersbase.py
index a9d8d91..246a9a7 100644
--- a/authorizenet/apicontrollersbase.py
+++ b/authorizenet/apicontrollersbase.py
@@ -214,7 +214,7 @@ def __init__(self, apiRequest):
          
         self._request = apiRequest
         __merchantauthentication = apicontractsv1.merchantAuthenticationType()
-        APIOperationBase.__environment = constants.SANDBOX
+        APIOperationBase.__environment = constants.PRODUCTION
         
         APIOperationBase.setmerchantauthentication(__merchantauthentication)