diff --git a/docs/_layouts/default.html b/docs/_layouts/default.html
index 2ae3ec109..bc0aace72 100644
--- a/docs/_layouts/default.html
+++ b/docs/_layouts/default.html
@@ -1,5 +1,10 @@
 <!DOCTYPE html>
-<html lang="{{ page.lang | site.lang }}">
+<html
+  lang="{{ page.lang | site.lang }}"
+  mlns="http://www.w3.org/1999/xhtml"
+  xmlns:og="http://ogp.me/ns#"
+  xmlns:fb="http://www.facebook.com/2008/fbml"
+>
   <head>
     <title>{{ page.title }} | SpaceVim</title>
     <meta name="baidu-site-verification" content="AN14j6xQVd" />
