diff --git a/build/moz.build b/build/moz.build
index 238caa7801292926db83b0ad4791b0400d30cba5..87bd7c541cdce8562ce6999e0b59fb5698348699 100644
--- a/build/moz.build
+++ b/build/moz.build
@@ -91,7 +91,7 @@ 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"]
 
