```ruby
class Fluid < Cask
  url 'http://fluidapp.com/dist/Fluid_1.7.1.zip'
  homepage 'http://fluidapp.com/'
  version '1.7.1'
  sha1 '052e8655cf07aeecdbdf274c179cf9faa8fbbf36'
  link 'Fluid.app'
end
```

Update Fluid to version 1.7.2
user
```ruby
class Fluid < Cask
  url 'http://www.fluidapp.com/dist/Fluid_1.7.2.zip'
  homepage 'http://fluidapp.com/'
  version '1.7.2'
  sha1 'fca86a652fdc7cf0a6dc4f67d4d7ef293d3a0a88'
  link 'Fluid.app'
end
```
assistant