diff --git a/content/patterns/dialog-modal/examples/css/dialog.css b/content/patterns/dialog-modal/examples/css/dialog.css
index 0bf4286f80..b5132a16a0 100644
--- a/content/patterns/dialog-modal/examples/css/dialog.css
+++ b/content/patterns/dialog-modal/examples/css/dialog.css
@@ -113,6 +113,7 @@
   right: 0;
   bottom: 0;
   left: 0;
+  z-index: 1;
 }
 
 @media screen and (min-width: 640px) {