diff --git a/site.tmpl b/site.tmpl
index 762bfe6..aab791e 100644
--- a/site.tmpl
+++ b/site.tmpl
@@ -11,7 +11,7 @@
 </head>
 <body>
   <div id="jswarning">JavaScriptが有効です。安全・安心の為、JavaScriptを無効にしてください。</div>
-  <script>document.getElementById('jswarning').style.display = 'block';</script>
+  <script type="text/javascript">document.getElementById('jswarning').style.display = 'block';</script>
   <div class="container">
     <img src="/static/Eqjk_WgVQAE2psn-new.jpeg" class="header-img" alt="ヘッダー" />
 {{ end }}
