diff --git a/public/index.html b/public/index.html
index b5eed270..b8a6d8d2 100644
--- a/public/index.html
+++ b/public/index.html
@@ -4,6 +4,11 @@
       <title>Authn | <%= process.env.SITE_NAME %></title>
       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
+      <script src="https://cdnjs.cloudflare.com/ajax/libs/iframe-resizer/4.3.6/iframeResizer.contentWindow.min.js"
+              integrity="sha512-R7Piufj0/o6jG9ZKrAvS2dblFr2kkuG4XVQwStX+/4P+KwOLUXn2DXy0l1AJDxxqGhkM/FJllZHG2PKOAheYzg=="
+              crossorigin="anonymous"
+              referrerpolicy="no-referrer">
+      </script>
   </head>
   <body>
     <div id="root"></div>
