diff --git a/vector/index.html b/vector/index.html
index 2ac64672f5..273cb4394f 100644
--- a/vector/index.html
+++ b/vector/index.html
@@ -42,5 +42,6 @@
     <section id="matrixchat" style="height: 100%;"></section>
     <script src="bundle.js"></script>
     <link rel="stylesheet" href="bundle.css">
+    <img src="img/warning.svg" width="24" height="23" style="visibility: hidden; position: absolute; top: 0px; left: 0px;"/>
   </body>
 </html>