diff --git a/site/docs/4.1/assets/img/favicons/manifest.json b/site/docs/4.1/assets/img/favicons/manifest.json
index 6ff36fdfdb..a92accba64 100644
--- a/site/docs/4.1/assets/img/favicons/manifest.json
+++ b/site/docs/4.1/assets/img/favicons/manifest.json
@@ -15,7 +15,7 @@
       "type": "image/png"
     }
   ],
-  "start_url": "/",
+  "start_url": "/?utm_source=a2hs",
   "theme_color": "#563d7c",
   "background_color": "#563d7c",
   "display": "standalone"