Workers at a Whole Foods Market in Pennsylvania voted to unionize on Monday, becoming the first group of employees to pull off a labor win at the Amazon-owned grocery store chain.

Workers at a Pennsylvania Whole Foods store voted on Monday to unionize, forming the first union in the organic grocery chain owned by Amazon. A majority of the employees at the flagship store in Philadelphia’s Center City neighborhood voted to join a local chapter of the United Food and Commercial Workers (UFCW),

Workers at a Whole Foods Market in Philly have voted to unionize, becoming the first group of employees to pull off a labor win at the chain.

Workers at a Whole Foods Market in Philadelphia voted to form a union, the first time employees of the Amazon-owned grocer have organized in decades. Monday’s vote, which passed 130-100, was prompted by workers’ push for higher wages and improved benefits.

The union win comes as Amazon, which owns the grocery chain, is also fighting labor organizing in its warehouse and delivery businesses.