diff --git a/assets/css/_addon/module.scss b/assets/css/_addon/module.scss
index 6bedbc6..79c8f59 100644
--- a/assets/css/_addon/module.scss
+++ b/assets/css/_addon/module.scss
@@ -38,6 +38,7 @@
 }
 
 %heading {
+  font-weight: 400;
   font-family: 'Lato', 'Microsoft Yahei', sans-serif;
 }