Boeing workers in the United States have voted to accept the aircraft manufacturer’s latest contract offer, ending a seven-week strike that crippled production of the 737 Max and 777.

The International Association of Machinists and Aerospace Workers (IAM) said on Monday that its members voted by 59 percent to approve the deal, which includes a 38 percent pay rise over four years as well as a one-off $12,000 bonus and changes to workers’ retirement plans.

The vote, which comes after union members rejected Boeing’s two previous offers, means that some 33,000 employees in the Seattle area will begin returning to work as early as Wednesday.

The strike has compounded a difficult year for Boeing, which has suffered heavy financial losses and faced intense scrutiny since an incident in January during which one of its aircraft lost a door panel midflight.