diff --git a/docs/.vuepress/styles/palette.scss b/docs/.vuepress/styles/palette.scss
index 0dcb826..7519e21 100644
--- a/docs/.vuepress/styles/palette.scss
+++ b/docs/.vuepress/styles/palette.scss
@@ -1,3 +1,4 @@
 
 // force LXGW WenKai.
 $vp-font: '"LXGW WenKai", sans-serif';
+$vp-font-heading: '"LXGW WenKai", sans-serif';