diff --git a/contrib/automation/hgautomation/aws.py b/contrib/automation/hgautomation/aws.py
--- a/contrib/automation/hgautomation/aws.py
+++ b/contrib/automation/hgautomation/aws.py
@@ -59,7 +59,7 @@
 UBUNTU_ACCOUNT_ID = '099720109477'
 
 
-WINDOWS_BASE_IMAGE_NAME = 'Windows_Server-2019-English-Full-Base-2019.07.12'
+WINDOWS_BASE_IMAGE_NAME = 'Windows_Server-2019-English-Full-Base-2019.11.13'
 
 
 KEY_PAIRS = {