diff --git a/frontend/src/app/main/ui/viewer.scss b/frontend/src/app/main/ui/viewer.scss
index 351d4414de..94f54ae5f6 100644
--- a/frontend/src/app/main/ui/viewer.scss
+++ b/frontend/src/app/main/ui/viewer.scss
@@ -15,6 +15,7 @@
 }
 
 .viewer-content {
+  overflow: hidden;
   grid-row: 2 / span 1;
   display: grid;
   grid-template-rows: $s-252 auto;