SPRINGFIELD, Ill. (AP) — Illinois lawmakers have quickly advanced a plan to overhaul Cook County’s pension system by increasing county payments and reducing some benefits for employees.

The Senate voted 36-16 on Tuesday to approve the changes that Cook County President Toni Preckwinkle says are necessary to keep the retirement system from dissolving in a couple of decades.

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The measure calls for a roughly $145 million increase in the county’s payment in 2016. The proposal would increase the retirement age, contributions, and change the cost-of-living adjustments. It resulted from negotiations between county leaders and some unions. One labor group says it may sue over the changes.

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Republicans who oppose the proposal say it will lead to property tax increases.

The measure now moves to the House.

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