diff --git a/index.html b/index.html
index c1f4c5d3..4c1c9905 100644
--- a/index.html
+++ b/index.html
@@ -3254,7 +3254,7 @@
                 style="margin-left: 0.1em"
               ></i>
             </div>
-            <iframe id="mfcgPreview" sandbox="allow-same-origin"></iframe>
+            <iframe id="mfcgPreview" sandbox="allow-scripts"></iframe>
           </div>
         </div>