```ruby
class DashBeta < Cask
  version '2.2.0'
  sha256 'e294b7f40436893b02a3d01739169fa2a2eed93945f91ca3233b439fd343ae40'

  url 'https://dl0tgz6ee3upo.cloudfront.net/production/app/builds/002/042/895/original/620a14dce3c435dc9f9d23e57d8ae668/Dash_Beta.app.zip'
  homepage 'http://kapeli.com/dash'
  license :unknown

  app 'Dash Beta.app'
end
```

Upgrade Dash Beta to v2.2.1
user
```ruby
class DashBeta < Cask
  version '2.2.1'
  sha256 '2a652e850c1d9bd99977b6bc2b842ff7eeb07ba401a1bceab43d6998a60f6756'

  url 'https://dl0tgz6ee3upo.cloudfront.net/production/app/builds/002/376/285/original/e1c44c93cf9c3d49ff42b6349e56630c/Dash_Beta.app.zip'
  homepage 'http://kapeli.com/dash'
  license :unknown

  app 'Dash Beta.app'
end
```
assistant