```ruby
class TorBrowser < Cask
  url 'https://www.torproject.org/dist/torbrowser/3.5.1/TorBrowserBundle-3.5.1-osx32_en-US.zip'
  homepage 'https://www.torproject.org/projects/torbrowser.html'
  version '3.5.1'
  sha1 'd155070b90d9244d52663b7fcf4127c8b24f5be5'
  link 'TorBrowserBundle_en-US.app'
end
```

Update Tor Browser checksum to SHA256
user
```ruby
class TorBrowser < Cask
  url 'https://www.torproject.org/dist/torbrowser/3.5.1/TorBrowserBundle-3.5.1-osx32_en-US.zip'
  homepage 'https://www.torproject.org/projects/torbrowser.html'
  version '3.5.1'
  sha256 '81305a009a1d939621ac1e651d7a1bf6569ff7b714bf3e1cf0b7cd4890f80e3d'
  link 'TorBrowserBundle_en-US.app'
end
```
assistant