```ruby
class Pupil < Cask
  url 'http://pupil.io/downloads/1.1/Pupil.app.zip'
  homepage 'http://pupil.io/'
  version '1.1'
  sha1 'a5a0a59b8963552776b06b11774dfa232b3c1c68'
  link 'Pupil.app'
end
```

Update Pupil Cask to use SHA256
user
```ruby
class Pupil < Cask
  url 'http://pupil.io/downloads/1.1/Pupil.app.zip'
  homepage 'http://pupil.io/'
  version '1.1'
  sha256 'd30e0cf8b45ab0a7ccd4ae9e99a788bb810ccf18c856ab446fc6d230d1159a03'
  link 'Pupil.app'
end
```
assistant