After Ticketfly’s data breach on May 30, the ticketing service has now restored its website and informed its customers on just how serious the breach was.

While hackers couldn’t access credit card numbers, they were able to acquire personal information from 27 million patrons, such as names, addresses, email addresses, and phone numbers, according to the company.

“Upon first learning about this incident we took swift action to secure the data of our clients and fans,” a spokesperson told Variety. “We take privacy and security very seriously and regret any disruption this has caused.”

Hackers stole the information on May 30; when Ticketfly found out, the company subsequently took the website offline. The site wasn’t back up until late Wednesday night.

While account passwords weren’t jeopardized, all customers’ passwords were reset just as a precaution. It was also recommended that customers reset their passwords on any other site or service where they’d been using the same login information.

Eventbrite purchased Ticketfly for $200 million last year. The ticketing service was previously owned by Pandora, which picked it up for $450 million in 2015.