diff --git a/templates/cimar_embed.html b/templates/cimar_embed.html
index a356fe24..71aecb31 100644
--- a/templates/cimar_embed.html
+++ b/templates/cimar_embed.html
@@ -5,7 +5,7 @@
     <div style="height: 100vh; width: 95%, mangin: 0; padding: 0; overflow: hidden;">
 
         
-        <iframe  crossorigin="anonymous" allow="credentialless" class="embedded-viewer" src="{{viewer_link}}" width="100%" height="95%" style="border:none;"></iframe>
+        <iframe  crossorigin="anonymous" allow='cross-origin-isolated' class="embedded-viewer" src="{{viewer_link}}" width="100%" height="95%" style="border:none;"></iframe>
 
     </div>