diff --git a/docs/app/assets/css/prettify.css b/docs/app/assets/css/prettify.css
index 354bbd544f11..b2a46fc23aea 100644
--- a/docs/app/assets/css/prettify.css
+++ b/docs/app/assets/css/prettify.css
@@ -46,6 +46,5 @@ ol.linenums li {
   font-size:12px;
   color: #bebec5;
   line-height: 18px;
-  text-shadow: 0 1px 0 #fff;
   list-style-type:decimal!important;
 }