Chicago Open Air has announced their 2019 lineup, following a one-year hiatus in 2018. The hard rock festival will return as a two-day event in 2019, taking place on May 18th and 19th at SeatGeek Stadium (formerly Toyota Park) in Bridgeview, Illinois.

On May 18th, System of a Down will headline the bill, in addition to Ghost, Meshuggah, Beartooth, Code Orange, Knocked Loose, and Vein.

On May 19th, Tool will headline the bill, in addition to The Prodigy, Gojira, In This Moment, Fever 333, The Black Dahlia Murder, and Alien Weaponry.

Tickets go on sale this Friday, December 14th, at 12 p.m. (CST) here, with two-day and single day ticket packages available.

For more information on ticket packages and the event, head to Chicago Open Air’s website.