```ruby
class PlexMediaServer < Cask
  url 'http://downloads.plexapp.com/plex-media-server/0.9.8.17.282-c844f09/PlexMediaServer-0.9.8.17.282-c844f09-OSX.zip'
  homepage 'http://plexapp.com'
  version '0.9.8.17.282'
  sha1 'e25fb8d9b363eb25a56d371412d38f9bc0d86488'
  link 'Plex Media Server.app'
end
```

Update to Plex Media Server 0.9.8.18.290
user
```ruby
class PlexMediaServer < Cask
  url 'http://downloads.plexapp.com/plex-media-server/0.9.8.18.290-11b7fdd/PlexMediaServer-0.9.8.18.290-11b7fdd-OSX.zip'
  homepage 'http://plexapp.com'
  version '0.9.8.18.290'
  sha1 '2bfc9db741b248c1164196ad56c38e9bdff09fd7'
  link 'Plex Media Server.app'
end
```
assistant