```ruby
class MiniMetro < Cask
  url 'http://static.dinopoloclub.com/minimetro/builds/alpha9/MiniMetro-alpha9e-osx.zip'
  homepage 'http://dinopoloclub.com/minimetro/'
  version 'Alpha 9e'
  sha256 'd2261a4e2ab6d71114af99524fa86c590b66f880c32c8546d556a2b80cc0be16'
  link 'MiniMetro-alpha9e-osx.app', :target => 'Mini Metro.app'
end
```

Upgrade Mini Metro to alpha10
user
```ruby
class MiniMetro < Cask
  url 'http://static.dinopoloclub.com/minimetro/builds/alpha10/MiniMetro-alpha10-osx.zip'
  homepage 'http://dinopoloclub.com/minimetro/'
  version 'Alpha 10'
  sha256 '7453b2edff9dc91416f7ad376830da38b15e02c03eae7573ddb9e526ce9309ee'
  link 'MiniMetro-alpha10-osx.app', :target => 'Mini Metro.app'
end
```
assistant