diff --git a/twitter_ads/__init__.py b/twitter_ads/__init__.py
index d4fc7ad..072b246 100644
--- a/twitter_ads/__init__.py
+++ b/twitter_ads/__init__.py
@@ -1,8 +1,8 @@
 # Copyright (C) 2015 Twitter, Inc.
 
 
-VERSION = (11, 0, 0)
-API_VERSION = '11'
+VERSION = (12, 0, 0)
+API_VERSION = '12'
 
 from twitter_ads.utils import get_version
 
diff --git a/twitter_ads/http.py b/twitter_ads/http.py
index c7e15b8..7174cde 100644
--- a/twitter_ads/http.py
+++ b/twitter_ads/http.py
@@ -24,8 +24,8 @@
 class Request(object):
     """Generic container for all API requests."""
 
-    _DEFAULT_DOMAIN = 'https://ads-api.twitter.com'
-    _SANDBOX_DOMAIN = 'https://ads-api-sandbox.twitter.com'
+    _DEFAULT_DOMAIN = 'https://ads-api.x.com'
+    _SANDBOX_DOMAIN = 'https://ads-api-sandbox.x.com'
 
     _HTTP_METHOD = [
         'get',