```ruby
class Anki < Cask
  url 'http://ankisrs.net/download/mirror/anki-2.0.17.dmg'
  homepage 'http://ankisrs.net/'
  version '2.0.17'
  sha1 '58cd3fa4ba568f380a4c8382ac878553e70f3a46'
  link 'Anki.app'
end
```

Update Anki to version 2.0.18
user
```ruby
class Anki < Cask
  url 'http://ankisrs.net/download/mirror/anki-2.0.18.dmg'
  homepage 'http://ankisrs.net/'
  version '2.0.18'
  sha1 'b9b22375e55b9aaac949e23c1eacc05b4fa6bb65'
  link 'Anki.app'
end
```
assistant