Laravel 5.1 Heroku Url Issues

I recently made a project with Laravel 5.1 and uploaded it to Heroku. The issue I'm having is if I go to http://yolio.xyz/rss the url for the RSS is http://ift.tt/1I66Qba instead of http://yolio.xyz

How would I go about changing my projects url to yolio.xyz on Heroku or Laravel?

EDIT:

The code that shows the url is literally just url('/rss')

via Chebli Mohamed