Seattle coffee giant Starbucks announced Monday that the company was hit by a ransomware attack, which caused significant disruptions in their operations.

A ransomware attack has disrupted a third-party software system that Starbucks uses to track and manage its baristas’ schedules, forcing the coffee chain to shift to manual mode to ensure its employees get paid properly,

Blue Yonder, which provides supply chain management software for thousands of companies, said a cyberattack had disrupted some services.