Starbucks and its union representing more than 10,000 baristas have agreed to bring in an outside mediator to help resume halted bargaining talks, Bloomberg News reported on Thursday.

Coffee chain giant Starbucks (SBUX) has been having labor troubles for a long time now. With some stores moving to become union shops, just

Starbucks Corp. and its union have agreed to bring in an outside mediator for contract negotiations in an effort to revive stalled talks and reach a landmark deal.

A labor agreement, covering more than 500 U.S. stores, would be the company’s first. Talks stalled last year over wages.