The King Soopers union worker strike ended on Monday night when both the grocery store chain and the union reached a return-to-work settlement.

According to statements from both the union and King Soopers, the agreement includes a 100-day period of “labor peace,” giving both sides time to resume contract negotiations. The truce also ensures that workers will not lose their health care coverage between now and a final contract deal.

King Soopers and the union agreed late Monday night to return to the bargaining table, ending 12 days of a strike against the supermarket chain in the Denver area and Pueblo.