```ruby
cask :v1 => 'font-menlo-powerline' do
  url 'https://gist.github.com/raw/1627888/c4e92f81f7956d4ceaee11b5a7b4c445f786dd90/Menlo-ForPowerline.ttc.zip'
  homepage 'https://powerline.readthedocs.org/en/latest/fontpatching.html'
  version '6.1d8e1'
  sha1 '9b317e7597c8acd5de2991175223eeb5cf694fde'
  font 'Menlo-ForPowerline.ttc'
end
```

Use SHA256 instead of outdated SHA1
user
```ruby
cask :v1 => 'font-menlo-powerline' do
  url 'https://gist.github.com/raw/1627888/c4e92f81f7956d4ceaee11b5a7b4c445f786dd90/Menlo-ForPowerline.ttc.zip'
  homepage 'https://powerline.readthedocs.org/en/latest/fontpatching.html'
  version '6.1d8e1'
  sha256 'd6c4c9ea1d852a68a1e009350f329c2b2b1c67ab955b5738829e7833ee3b84ef'
  font 'Menlo-ForPowerline.ttc'
end
```
assistant