```ruby
class Omnifocus < Cask
  version 'latest'
  sha256 :no_check

  url 'https://www.omnigroup.com/download/latest/omnifocus'
  homepage 'http://www.omnigroup.com/products/omnifocus/'

  link 'OmniFocus.app'
end
```

Fix download protocol in OmniFocus.app Cask
user
```ruby
class Omnifocus < Cask
  version 'latest'
  sha256 :no_check

  url 'http://www.omnigroup.com/download/latest/omnifocus'
  homepage 'http://www.omnigroup.com/products/omnifocus/'

  link 'OmniFocus.app'
end
```
assistant