```ruby
class Sonos < Cask
  version '5.1'
  sha256 '8a54102eb13879bd361624fa013279aecd27888b9575e19d60985dd029635d8a'

  url 'http://update.sonos.com/software/mac/mdcr/SonosDesktopController51.dmg'
  homepage 'http://www.sonos.com/'
  license :unknown

  app 'Sonos.app'
end
```

Upgrade Sonos.app to latest version.
user
```ruby
class Sonos < Cask
  version :latest
  sha256 :no_check

  url 'http://www.sonos.com/redir/controller_software_mac'
  homepage 'http://www.sonos.com/'
  license :unknown

  app 'Sonos.app'
end
```
assistant