```ruby
class Iterm2Beta < Cask
  url 'http://www.iterm2.com/downloads/beta/iTerm2-1_0_0_20131218.zip'
  homepage 'http://www.iterm2.com/'
  version '1.0.0.20131218'
  sha1 '51a099ed6be536bc517ca22fb2cb5db6706e1fd6'
  link 'iTerm.app'
end
```

Update iterm2 version to 20131228
user
```ruby
class Iterm2Beta < Cask
  url 'http://www.iterm2.com/downloads/beta/iTerm2-1_0_0_20131228.zip'
  homepage 'http://www.iterm2.com/'
  version '1.0.0.20131228'
  sha1 'd771ed0cbb7d422539befc529c5ece6cf09011e5'
  link 'iTerm.app'
end
```
assistant