Gemfile is incompatible with Ruby 2.4
Installing chef-zero 13.1.0
Gem::InstallError: chef-zero requires Ruby version >= 2.3.1.
Using net-ssh-multi 1.2.1
Using specinfra 2.73.2
Using rspec_junit_formatter 0.2.3
Using rspec-its 1.2.0
Using rspec 3.7.0
Using license_scout 1.0.0
Using domain_name 0.5.20170404
Using signet 0.8.1
Installing ohai 13.7.1
Gem::InstallError: ohai requires Ruby version >= 2.3.
Using rubocop-rspec 1.12.0
Using aws-sdk 2.6.33
An error occurred while installing chef-zero (13.1.0), and Bundler cannot continue.
Make sure that `gem install chef-zero -v '13.1.0'` succeeds before bundling.
With most/all projects across the company moving to Ruby 2.4 it would probably nice to use it here too. Or at least be compatible.