diff --git a/data/microsoft b/data/microsoft
index e882e8aa..ddb0ee75 100644
--- a/data/microsoft
+++ b/data/microsoft
@@ -5,6 +5,7 @@ microsoftonline-p.com
 live.com
 outlook.com
 windows.net
+windowsupdate.com
 microsoftonline.com
 passport.net
 dynamics.com