diff --git a/docs/lab/index.html b/docs/lab/index.html
index 08ba8c9fd..4239cdfd2 100644
--- a/docs/lab/index.html
+++ b/docs/lab/index.html
@@ -852,6 +852,7 @@ h2 {
   user-select:none;
   font-family: sans-serif !important;
   overflow: auto;
+  letter-spacing:0.01em;
 }
 .options > * {
   display: block;