Amazon is facing its second workers’ union vote in as many months as laborers at a warehouse in suburban Raleigh, North Carolina, decide this week whether they wish to collectively bargain with the retail giant.

Workers at the five-year-old warehouse in the city of Garner will vote through Friday to join or reject the upstart Carolina Amazonians United for Solidarity and Empowerment, or CAUSE, which seeks to push Amazon for higher wages, longer breaks and more scheduling flexibility, among other things. They will need a simple majority among voters to join the union.

In January, workers at a Whole Foods store in Philadelphia voted to unionize, the first successful organizing effort at the national grocery chain that Amazon acquired in 2017 for nearly $14 billion.