diff --git a/src/wp-admin/css/common.css b/src/wp-admin/css/common.css
index 16f3ae88626c0..97820dd06bc16 100644
--- a/src/wp-admin/css/common.css
+++ b/src/wp-admin/css/common.css
@@ -330,7 +330,7 @@ h4,
 h5,
 h6 {
 	display: block;
-	font-weight: 600;
+	font-weight: 400;
 }
 
 h1 {