diff --git a/src/panels/iframe/ha-panel-iframe.js b/src/panels/iframe/ha-panel-iframe.js
index 28d220de25..eee67cf102 100644
--- a/src/panels/iframe/ha-panel-iframe.js
+++ b/src/panels/iframe/ha-panel-iframe.js
@@ -24,7 +24,7 @@ class HaPanelIframe extends PolymerElement {
 
       <iframe
         src="[[panel.config.url]]"
-        sandbox="allow-forms allow-popups allow-pointer-lock allow-same-origin allow-scripts"
+        sandbox="allow-forms allow-popups allow-pointer-lock allow-same-origin allow-scripts allow-modals"
         allowfullscreen="true"
         webkitallowfullscreen="true"
         mozallowfullscreen="true"