diff --git a/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.js b/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.js
index 99b4ae707..e830c41fd 100644
--- a/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.js
+++ b/src/Bundle/ChillWopiBundle/src/Resources/public/page/editor/index.js
@@ -14,7 +14,10 @@ window.addEventListener('DOMContentLoaded', function(e) {
     office_frame.setAttribute('allowfullscreen', 'true');
 
     // The sandbox attribute is needed to allow automatic redirection to the O365 sign-in page in the business user flow
-    office_frame.setAttribute('sandbox', 'allow-downloads allow-scripts allow-same-origin allow-forms allow-popups allow-top-navigation allow-popups-to-escape-sandbox');
+    office_frame.setAttribute(
+        'sandbox',
+        'allow-downloads allow-scripts allow-same-origin allow-forms allow-modals allow-popups allow-top-navigation allow-popups-to-escape-sandbox'
+    );
     frameholder.appendChild(office_frame);
 
     document.getElementById('office_form').submit();