diff --git a/lms/static/sass/course/layout/_courseware_preview.scss b/lms/static/sass/course/layout/_courseware_preview.scss
index b53628e14f..f72b6c8b16 100644
--- a/lms/static/sass/course/layout/_courseware_preview.scss
+++ b/lms/static/sass/course/layout/_courseware_preview.scss
@@ -63,6 +63,7 @@ $proctoring-banner-text-size: 14px;
 
     box-shadow: 0 3px 3px $shadow-d1;
     position: fixed;
+    z-index: 100;
     top: 0;
     width: 100%;
   }