Some 300 workers at an Amazon-owned Whole Foods store in Philadelphia have voted to unionize, mirroring a pro-union shift in public opinion, according to Gallup.

Workers at a Pennsylvania Whole Foods store voted on Monday to unionize, forming the first union in the organic grocery chain owned by Amazon.

The union win, at a Philadelphia store where workers are seeking higher wages, comes as Amazon is also fighting organizing efforts among some warehouse employees and delivery drivers.