Last week, Walmart announced a large-scale wage hike: about 40% of its 1.3 million-strong U.S. workforce will see their pay hit $9 an hour, well above the federal minimum of $7.25. That base wage will increase to $10 in 2016.

The move followed years of protests by Walmart employees and their allies, who have been campaigningalongside fast food and other low-wage workers for $15 hourly pay.

Days after CEO Doug McMillon’s announcement, members of union-backed labor group Organization United for Respect at Walmart (OUR Walmart) have both taken credit for the company’s decision to boost pay and promised to carry on fighting for a $15 wage.