README.md in yuuki-0.1.1 vs README.md in yuuki-0.1.2

@@ -19,10 +19,14 @@
     $ gem install yuuki
 
 ## Usage
 
 ```ruby
+require 'yuuki'
+
 class HogeClass
+  extend Yuuki::Runner
+
   add :a
   def a
     puts 'a'
   end