```ruby
class Robomongo < Cask
  url 'http://robomongo.org/files/mac/Robomongo-0.8.4-RC2-x86_64.dmg'
  homepage 'http://robomongo.org'
  version '0.8.4-RC2'
  sha1 '2e619ae87950e063568017f8c6e458c57fa31be6'
  link 'Robomongo.app'
end
```

Update Robomongo to stable 0.8.4
user
```ruby
class Robomongo < Cask
  url 'http://robomongo.org/files/mac/Robomongo-0.8.4-x86_64.dmg'
  homepage 'http://robomongo.org'
  version '0.8.4'
  sha1 '776f581379472996b039cbfd541a81f7377ea6f7'
  link 'Robomongo.app'
end
```
assistant