diff --git a/index.html b/index.html
index 2645dae..4e01516 100644
--- a/index.html
+++ b/index.html
@@ -11,5 +11,16 @@
     <input type="text" name="name" id="name">
     <input type="submit" value="送信" onclick="gettext()">
     <p id="test">名前を入力してください。</p>
+    
+      <script type="application/javascript">
+    if ('serviceWorker' in navigator) {
+      navigator.serviceWorker
+        .register('./serviceworker.js')
+        .then(function() {
+          console.log('service worker registered');
+        });
+    }
+  </script>
+    
   </body>
 </html>