diff --git a/panels/iframe/ha-panel-iframe.html b/panels/iframe/ha-panel-iframe.html
index e666ee2dd3..d1159570ab 100644
--- a/panels/iframe/ha-panel-iframe.html
+++ b/panels/iframe/ha-panel-iframe.html
@@ -22,6 +22,7 @@
     <iframe
       src='[[panel.config.url]]'
       sandbox="allow-forms allow-popups allow-pointer-lock allow-same-origin allow-scripts"
+      allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true"
     ></iframe>
   </template>
 </dom-module>