travis-ci/travis-boxes — pull request #13 by wenzowski (2013-04-08 18:15:07+00:00)
Title: bundler symbol source is deprecated

message from bundler:

The source :rubygems is deprecated because HTTP requests are insecure.
Please change your source to 'https://rubygems.org' if possible, or 'http://rubygems.org' if not.