diff --git a/projects/ToDoList/index.html b/projects/ToDoList/index.html
index 4ecdfc6..6db0f09 100644
--- a/projects/ToDoList/index.html
+++ b/projects/ToDoList/index.html
@@ -4,6 +4,13 @@
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
+      <link rel="manifest" href="manifest.json">
+  <script>
+        //if browser support service worker
+        if('serviceWorker' in navigator) {
+          navigator.serviceWorker.register('sw.js');
+        };
+  </script>
     <title>ToDo List</title>
     <link rel="icon" href=
     "assests/logo.png"
