diff --git a/index.manifest b/index.manifest
index 1eeee8c99..1eb1aec3c 100644
--- a/index.manifest
+++ b/index.manifest
@@ -1,7 +1,7 @@
 {
   "name": "index",
   "short_name": "MapComplete",
-  "start_url": "/index.html",
+  "start_url": "index.html",
   "display": "standalone",
   "background_color": "#fff",
   "description": "A thematic map viewer and editor based on OpenStreetMap",