```ruby
class Skitch < Cask
  url 'http://cdn1.evernote.com/skitch/mac/release/Skitch-2.0.5.zip'
  homepage 'http://evernote.com/skitch/'
  version '2.0.5'
  sha1 '64d61e76eb8bd2540f84b5d21ee1ac5f93c74a61'
  link 'Skitch.app'
end
```

Update Skitch to v. 2.5.2
user
```ruby
class Skitch < Cask
  url 'http://cdn1.evernote.com/skitch/mac/release/Skitch-2.5.2.zip'
  homepage 'http://evernote.com/skitch/'
  version '2.5.2'
  sha1 '2c4dd590d70759ff69f293e1ae00a4b55cca9e37'
  link 'Skitch.app'
end
```
assistant