diff --git a/index.html b/index.html
index 180934a..83a968d 100644
--- a/index.html
+++ b/index.html
@@ -12,5 +12,16 @@
     <input type="text" name="name" id="name">
     <input type="submit" value="送信" onclick="gettext()">
     <p id="text"> 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>