diff --git a/examples/simple.js b/examples/simple.js
index 2929597..28043ac 100644
--- a/examples/simple.js
+++ b/examples/simple.js
@@ -1,6 +1,6 @@
 'use strict';
 
-require('rc-slider/assets/index.css');
+require('rc-slider/assets/index.less');
 
 var Slider = require('rc-slider');
 var React = require('react');