diff --git a/packages/nav-bar/index.less b/packages/nav-bar/index.less
index dbbfc0a4..1a452491 100644
--- a/packages/nav-bar/index.less
+++ b/packages/nav-bar/index.less
@@ -30,6 +30,7 @@
     margin: 0 auto;
     max-width: 60%;
     font-size: 16px;
+    font-weight: 500;
   }
 
   &__left,