```ruby
class Codekit < Cask
  url 'http://incident57.com/codekit/files/codekit-16895.zip'
  appcast 'https://incident57.com/codekit/appcast/ck2appcast.xml'
  homepage 'http://incident57.com/codekit/'
  version '2.0.3 (16895)'
  sha256 'd98ac91e4e44c833217f55b7dcb389f5730213bb7d801188b3823f695f00b741'
  link 'CodeKit.app'
end
```

Update CodeKit version to 2.0.6
user
```ruby
class Codekit < Cask
  url 'http://incident57.com/codekit/files/codekit-17018.zip'
  appcast 'https://incident57.com/codekit/appcast/ck2appcast.xml'
  homepage 'http://incident57.com/codekit/'
  version '2.0.6 (17018)'
  sha256 '97070e0fd9949991186652e2b3655c26459c5d7c0ab852c2ea3241078894573e'
  link 'CodeKit.app'
end
```
assistant