diff --git a/contrib/automation/hgautomation/cli.py b/contrib/automation/hgautomation/cli.py
--- a/contrib/automation/hgautomation/cli.py
+++ b/contrib/automation/hgautomation/cli.py
@@ -204,7 +204,7 @@
     parser.add_argument(
         '--aws-region',
         help='AWS region to use',
-        default='us-west-1',
+        default='us-west-2',
     )
 
     subparsers = parser.add_subparsers()