[ajsharp]

FWIW domain_info doesn't appear to be on rubygems.org.

[igor_a]

Thanks for pointing it out. I link directly https://github.com/iafonov/domain_info in Gemfile. But anyway just pushed it to rubygems - https://rubygems.org/gems/domain_info, so you can link it as `gem "domain_info", "~> 0.0.1"`