CSS not updating on change laravel

i'm currently working on a project in laravel 5.1 and i can't figure out what i'm doing wrong.

I use gulp to update my scss files to css files. Everytime i run gulp my files get updates the way they should be updated, but my browser doesn't find the updates.

In my editor the .css file is correct, but my browser doesn't register the updates.

cntrl + shift + f5 doens't work either. Anbody has a solution for me?

via Chebli Mohamed