Employees of the Whole Foods grocery store in Philadelphia voted to unionize on Monday in a narrow victory.

This is the first union for the Amazon-owned store. It came down to a narrow margin of 130 workers voting to join the United Food and Commercial Workers while 100 voted against it. This union also represents about 835,000 workers from Kroger, Albertsons-Safeway, Giant, Stop & Shop, Raley’s, Piggly Wiggly, and ShopRite.