Boeing and the union representing striking machinists have negotiated a new contract proposal that includes wage increases and bigger bonuses, aiming to end a costly walkout that paralyzed aircraft production for more than a month .

The International Association of Machinists and Aerospace Workers announced Saturday morning that it plans to hold a ratification vote on Wednesday.

The union said the deal would increase wages by 35% over four years, up from 30% proposed last month. It also increases initial bonuses to $7,000 per worker from $6,000.

The new offer would not restore a traditional pension plan — a key demand of the 33,000 striking workers — but it would increase the amount of contributions to 401(k) retirement plans that Boeing would match, the union said.

“We look forward to our employees voting on the negotiated proposal,” Boeing said in a statement.

Approximately 33,000 members of IAM District 751 began a strike on September 14. The strike halted production of Boeing 737s, including the 737 Max, as well as the 767 and 777. Boeing continues to build 787 Dreamliners at a non-union factory in South Carolina.

The strike led Boeing’s new CEO, Kelly Ortberg, to announce about 17,000 layoffs and take early steps to raise up to $25 billion from new stock or debt to shore up the company’s finances. ‘business.