diff --git a/build/moz.build b/build/moz.build
index ad78395c33bba4f6a7bd73bae2a3b6e0658ed59e..a3ba1001a60b764c9ef1c824917fe4d5b81ed0b2 100644
--- a/build/moz.build
+++ b/build/moz.build
@@ -90,7 +90,7 @@ if CONFIG["MOZ_APP_BASENAME"]:
         if CONFIG[var]:
             appini_defines[var] = True
 
-    appini_defines["MOZ_APPUPDATE_HOST"] = "aus5.mozilla.org"
+    appini_defines["MOZ_APPUPDATE_HOST"] = "updates.zen-browser.app"
     if CONFIG["MOZ_APPUPDATE_HOST"]:
         appini_defines["MOZ_APPUPDATE_HOST"] = CONFIG["MOZ_APPUPDATE_HOST"]
 
