Unfortunately I cannot upgrade to 4.4.3 as I am running Ruby 1.9.2. It gives me following error.

Gem::InstallError: code_metrics requires Ruby version >= 1.9.3.
An error occurred while installing code_metrics (0.1.0), and Bundler cannot continue.
Make sure that `gem install code_metrics -v '0.1.0'` succeeds before bundling.