```ruby
cask 'sidekick' do
  version '4.2.8'
  sha256 'ecba54e6c19e510d4655c8afb5fb79616f75ff352a92e142c9b52291a3664fe1'

  url "http://releases.oomphalot.com/Sidekick/Sidekick_#{version}.zip"
  appcast 'http://updates.oomphalot.com/?app=Sidekick',
          checkpoint: '3189e9a047142b750c4a04e2d5b1b83fb3424581e9430688b07a48c148767fe1'
  name 'Sidekick'
  homepage 'http://oomphalot.com/sidekick/'
  license :commercial

  app 'Sidekick.app'

  postflight do
    suppress_move_to_applications
  end
end
```

Add auto_updates flag to Sidekick
user
```ruby
cask 'sidekick' do
  version '4.2.8'
  sha256 'ecba54e6c19e510d4655c8afb5fb79616f75ff352a92e142c9b52291a3664fe1'

  url "http://releases.oomphalot.com/Sidekick/Sidekick_#{version}.zip"
  appcast 'http://updates.oomphalot.com/?app=Sidekick',
          checkpoint: '3189e9a047142b750c4a04e2d5b1b83fb3424581e9430688b07a48c148767fe1'
  name 'Sidekick'
  homepage 'http://oomphalot.com/sidekick/'
  license :commercial

  auto_updates true

  app 'Sidekick.app'

  postflight do
    suppress_move_to_applications
  end
end
```
assistant