diff --git a/docs_theme/css/default.css b/docs_theme/css/default.css
index d998fbeed..14457a699 100644
--- a/docs_theme/css/default.css
+++ b/docs_theme/css/default.css
@@ -182,7 +182,7 @@ body{
 }
 
 #main-content h3, #main-content h4, #main-content h5 {
-    font-weight: 500;
+    font-weight: 300;
     margin-top: 15px
 }