diff --git a/css/reveal.scss b/css/reveal.scss
index df039788..4bb64b18 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -1073,7 +1073,7 @@ $controlsArrowAngleActive: 36deg;
 	background: black;
 	visibility: hidden;
 	opacity: 0;
-	z-index: 10001;
+	z-index: 99;
 	transition: all 1s ease;
 }