```ruby
cask :v1 => 'trailer' do
  version '1.3.3'
  sha256 'eb8213ec3b7cc74a59c4f18a035cc20b6c4a0c494d62002e293f793164589427'

  url "http://ptsochantaris.github.io/trailer/trailer#{version.gsub('.','')}.zip"
  appcast 'http://ptsochantaris.github.io/trailer/appcast.xml',
          :sha256 => 'aaf3f91888b757ec234643a9f45259fd9650a687c6146c723084e7d80979a6a4'
  name 'Trailer'
  homepage 'http://ptsochantaris.github.io/trailer/'
  license :mit

  app 'Trailer.app'
end
```

Update Trailer to version 1.3.4
user
```ruby
cask :v1 => 'trailer' do
  version '1.3.4'
  sha256 '3daf054656f635a1ec17eb84fac56867da0511b206c7b6a4b4f80562f4fa1f4b'

  url "http://ptsochantaris.github.io/trailer/trailer#{version.gsub('.','')}.zip"
  appcast 'http://ptsochantaris.github.io/trailer/appcast.xml',
          :sha256 => 'aaf3f91888b757ec234643a9f45259fd9650a687c6146c723084e7d80979a6a4'
  name 'Trailer'
  homepage 'http://ptsochantaris.github.io/trailer/'
  license :mit

  app 'Trailer.app'
end
```
assistant