Bundle with ease

Lately, running a bundle install (either working on a new project or just adding an additional gem) will not continue and give out an error almost similar to:

Unfortunately, a fatal error has occurred. Please report this error to the Bundler issue tracker at https://github.com/carlhuda/bundler/issues so that we can fix it. Please include the full output of the command, your Gemfile and Gemfile.lock. Thanks!

Quick fix:
Change the first line on your Gemfile (the gem source). Usually reads like:
source 'http://rubygems.org' to
source 'https://rubygems.org'.

Noticed nothing different? It's the HTTPS. Could save you a lot of head scratching and furious caffeine intake!