diff --git a/_config.yml b/_config.yml
index b0b4019b78..0d47d652ba 100644
--- a/_config.yml
+++ b/_config.yml
@@ -36,7 +36,6 @@ expo:             http://expo.getbootstrap.com
 themes:           http://themes.getbootstrap.com
 
 cdn:
-  css:            https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css
-  css_theme:      https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css
-  js:             https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js
+  css:            https://cdn.rawgit.com/twbs/bootstrap/v4-dev/dist/css/bootstrap.css
+  js:             https://cdn.rawgit.com/twbs/bootstrap/v4-dev/dist/js/bootstrap.js
   jquery:         https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js