diff --git a/templates/partial/header.html.ep b/templates/partial/header.html.ep
index 850e77b..2422819 100644
--- a/templates/partial/header.html.ep
+++ b/templates/partial/header.html.ep
@@ -3,5 +3,5 @@
 %= asset 'korap.css'
 %= asset 'korap.js'
   <meta charset="utf-8" />
-  <meta name="viewport" content="width=device-width;initial-scale=1.0;" />
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=false, user-scalable=no" />
 </head>
diff --git a/templates/partial/javascript.html.ep b/templates/partial/javascript.html.ep
index 81c7519..422a29e 100644
--- a/templates/partial/javascript.html.ep
+++ b/templates/partial/javascript.html.ep
@@ -65,8 +65,11 @@
   var tut = $("#tutorial");
   tut.addClass("active");
   var iframe = tut.children("iframe");
+/*
   var src = iframe.attr("data-src");
   iframe.attr("src", src);
+*/
+  iframe.attr("src", getTutorialPage());
 };
 
 function closeTutorial (o) {