```ruby
class LyricsMaster < Cask
  version '2.4.1'
  sha256 '773cb3996b5f946b506214a0087afebdb7f7350ac17f477cc3f31bedf2a9be0c'

  url 'http://www.kenichimaehashi.com/lyricsmaster/download/LyricsMaster2410.dmg'
  homepage 'http://www.kenichimaehashi.com/lyricsmaster/'

  link 'Lyrics Master'
end
```

Upgrade Lyrics Master.app to v2.4.2
user
```ruby
class LyricsMaster < Cask
  version '2.4.2'
  sha256 '1cd0f639ea1e557e0abef320ee8ea61877c24bab444cb573bfd41d0887605d7f'

  url 'http://www.kenichimaehashi.com/lyricsmaster/download/LyricsMaster2420.dmg'
  homepage 'http://www.kenichimaehashi.com/lyricsmaster/'

  link 'Lyrics Master'
end
```
assistant