diff --git a/web/iframe.html b/web/iframe.html
index 84e1b613..0367a1f5 100644
--- a/web/iframe.html
+++ b/web/iframe.html
@@ -4,6 +4,7 @@
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width,initial-scale=1">
   <title>remark42</title>
+  <base target="_blank">
   <link rel="stylesheet" href="remark.css">
 </head>
 <body>
