diff --git a/packages/@vuepress/core/lib/app/root-mixins/updateLoadingState.js b/packages/@vuepress/core/lib/app/root-mixins/updateLoadingState.js
index 0a6f62ff06..f42c18e250 100644
--- a/packages/@vuepress/core/lib/app/root-mixins/updateLoadingState.js
+++ b/packages/@vuepress/core/lib/app/root-mixins/updateLoadingState.js
@@ -6,7 +6,8 @@ export default {
       this.$vuepress.$set('contentMounted', true)
 
       this.$smoothScroll = new SmoothScroll('a[href*="#"]', {
-        speed: 1000,
+        speed: 400,
+        speedAsDuration: true,
         easing: 'easeInOutCubic'
       })