README.md in chinese_pinyin-0.1.0 vs README.md in chinese_pinyin-0.2.0

@@ -9,9 +9,12 @@
 <pre><code>sudo gem install chinese_pinyin</code></pre>
 
 ## Usage
 
 <pre><code>
+require 'rubygems'
+require 'chinese_pinyin'
+
 Pinyin.t('中国')  => "zhong guo"
 Pinyin.t('中国', '-') => "zhong-guo"
 Pinyin.t('中国', '') => "zhongguo"
 Pinyin.t('你好world') => "ni hao world"
 </code></pre>