diff --git a/gocardless_pro/api_client.py b/gocardless_pro/api_client.py
index 351532eb..9b127d8e 100644
--- a/gocardless_pro/api_client.py
+++ b/gocardless_pro/api_client.py
@@ -150,7 +150,7 @@ def _default_headers(self):
             'Authorization': 'Bearer {0}'.format(self.access_token),
             'Content-Type': 'application/json',
             'GoCardless-Client-Library': 'gocardless-pro-python',
-            'GoCardless-Client-Version': '3.2.0',
+            'GoCardless-Client-Version': '3.3.0',
             'User-Agent': self._user_agent(),
             'GoCardless-Version': '2015-07-06',
         }
@@ -159,7 +159,7 @@ def _user_agent(self):
         python_version = '.'.join(platform.python_version_tuple()[0:2])
         vm_version = '{}.{}.{}-{}{}'.format(*sys.version_info)
         return ' '.join([
-            'gocardless-pro-python/3.2.0',
+            'gocardless-pro-python/3.3.0',
             'python/{0}'.format(python_version),
             '{0}/{1}'.format(platform.python_implementation(), vm_version),
             '{0}/{1}'.format(platform.system(), platform.release()),