```ruby
class Fantastical < Cask
  url 'http://flexibits.com/fantastical/download'
  homepage 'http://flexibits.com/fantastical'
  version 'latest'
  no_checksum
end
```

Use a specific version of Fantastical
user
```ruby
class Fantastical < Cask
  url 'http://cdn.flexibits.com/Fantastical_1.3.7.zip'
  homepage 'http://flexibits.com/fantastical'
  version '1.3.7'
  sha1 'eb45109ae9bcf54b8856129f698cb6e61e57c030'
end
```
assistant