using latest ruby version

I just receive this error when tried run the project in localhost
```
WARNING: Please be aware that you just installed a ruby that is no longer maintained (2014-02-23), for a list of maintained rubies visit:

    http://bugs.ruby-lang.org/projects/ruby/wiki/ReleaseEngineering

Please consider upgrading to ruby-2.1.2 which will have all of the latest security patches.
```