diff --git a/services/web/frontend/stylesheets/bootstrap-5/pages/editor/pdf.scss b/services/web/frontend/stylesheets/bootstrap-5/pages/editor/pdf.scss
index 08b2e1d5eb..8a8fa49f97 100644
--- a/services/web/frontend/stylesheets/bootstrap-5/pages/editor/pdf.scss
+++ b/services/web/frontend/stylesheets/bootstrap-5/pages/editor/pdf.scss
@@ -174,6 +174,8 @@
 }
 
 .pdf-viewer {
+  isolation: isolate;
+
   iframe {
     width: 100%;
     height: 100%;