diff --git a/modules/doc/public/css/module.less b/modules/doc/public/css/module.less
index 035c18278..684d4a4bb 100644
--- a/modules/doc/public/css/module.less
+++ b/modules/doc/public/css/module.less
@@ -24,7 +24,8 @@ pre > code {
 }
 
 .chapter a {
-  border-bottom: 1px @gray-light dotted;
+  border-bottom: 1x @gray-light dotted;
+  font-weight: @font-weight-bold;
 
   &:hover {
     border-bottom: 1px @text-color solid;