```ruby
class IstatMenus < Cask
  url 'http://s3.amazonaws.com/bjango/files/istatmenus4/istatmenus4.05.zip'
  homepage 'http://bjango.com/mac/istatmenus/'
  version '4.05'
  sha1 'fd0b07186e64e5843177188fcd985589deed62be'
  link 'iStat Menus.app'
end
```

Update iStat Menus to v. 4.06
user
```ruby
class IstatMenus < Cask
  url 'http://s3.amazonaws.com/bjango/files/istatmenus4/istatmenus4.06.zip'
  homepage 'http://bjango.com/mac/istatmenus/'
  version '4.06'
  sha1 '292630b92b44e44a589ba6be872b252f10138d99'
  link 'iStat Menus.app'
end
```
assistant