diff --git a/src/app-core.js b/src/app-core.js
index d6cc86df5b..0cd2739817 100644
--- a/src/app-core.js
+++ b/src/app-core.js
@@ -33,7 +33,7 @@ setTimeout(hass.startLocalStoragePreferencesSync, 5000);
 
 if ('serviceWorker' in navigator) {
   window.addEventListener('load', function() {
-    navigator.serviceWorker.register('/service-worker.js');
+    navigator.serviceWorker.register('/service_worker.js');
   });
 }