Mcdonald’s is the latest major corporation to fall victim to a hacking attack. They recently disclosed that hackers found a way into their network and stole information belonging to employees and customers in the United States, South Korea, and Taiwan.

If there’s a silver lining in the disclosure, it lies in the fact that Mcdonald’s could confirm that no payment information was stolen. Nonetheless, the hackers could abscond with a raft of personal information, including email addresses, phone numbers, physical addresses, and the full names of an as-yet-undetermined number of customers and employees.

As part of their disclosure, the company said they were working with law enforcement and an outside internet security vendor to conclude the investigation. They included that they were in the process of contacting any customer whose information was compromised by the breach.

If you live in the United States, Korea, or Taiwan and are a regular Mcdonald’s customer and have created a login on the company’s site or have downloaded the Mcdonald’s app, you may be getting a letter from the company explaining that the information you shared with the company was compromised. The letter should outline the company’s next planned steps. Even if you don’t get a communication from them, your best bet is to change your McDonald’s/app password right away.