diff --git a/authorizenet/constants.py b/authorizenet/constants.py
index 702a557..33866da 100644
--- a/authorizenet/constants.py
+++ b/authorizenet/constants.py
@@ -16,7 +16,7 @@ class constants(object):
     PRODUCTION = 'https://api2.authorize.net/xml/v1/request.api'
 
     '''clientId'''
-    version = '1.0.15'
+    version = '1.1.0'
     clientId = 'sdk-python-' + version
 
     '''xml encoding'''