diff --git a/doc/ServerDocument.md b/doc/ServerDocument.md
index bba0f3d..48e0887 100644
--- a/doc/ServerDocument.md
+++ b/doc/ServerDocument.md
@@ -76,11 +76,6 @@
 ```
 
 
-```ruby
-require 'redcarpet'
-markdown = Redcarpet.new("Hello World!")
-puts markdown.to_html
-```
 
 注意：参数是按字母升序排列