Jekyll serve suddenly switched from localhost to 0.0.0.0 - any fix?

Question

When using Jekyll command 'Jekyll serve', the local url switched from http ://localhost:4000/ to http ://0.0.0.0:4000/ - it was working fine, not sure what would have changed?

Any suggestions for getting back to the original config?

Mac OS 10.9.3, RVM Ruby 2.1.2

I've read some posts where users originally got hit with 0.0.0.0 - but my initial install was working fine.

Thanks!

Answer 1

In _config.yml

# deployment
host: 0.0.0.0
port: 5000

This can change host and port.

Answer 2

The default configuration changed.

Use jekyll serve --host localhost or set host: localhost in _config.yml