diff --git a/packages/@vuepress/theme-default/components/DropdownLink.vue b/packages/@vuepress/theme-default/components/DropdownLink.vue
index be6563faec..d14eea9a5b 100644
--- a/packages/@vuepress/theme-default/components/DropdownLink.vue
+++ b/packages/@vuepress/theme-default/components/DropdownLink.vue
@@ -229,8 +229,6 @@ export default {
     &.open .nav-dropdown
       // override the inline style.
       display block !important
-    &.open:blur
-      display none
     .nav-dropdown
       display none
       // Avoid height shaked by clicking