diff --git a/website/static/separate-css/playground.css b/website/static/separate-css/playground.css
index e4238ae1..9202ca06 100644
--- a/website/static/separate-css/playground.css
+++ b/website/static/separate-css/playground.css
@@ -272,7 +272,7 @@ input[type="number"] {
 
 .tooltip {
   position: absolute;
-  z-index: 1;
+  z-index: 6;
   bottom: 100%;
   left: 50%;
   transform: translateX(-50%);