The state's high court announced Thursday that it will take up an expedited appeal involving the city of Chicago's pension reform overhaul.

A Cook County Judge deemed Chicago's pension measure unconstitutional last month. The city has appealed the lower court ruling to the Illinois Supreme Court, which says it will hear oral arguments on the case in November. 

At issue is a 2014 Chicago pension measure impacting the city's Municipal and Laborers pension funds.

Under the Chicago pension measure, which took effect January 1, city workers had to pay more into their pension funds and cost-of-living increases were reduced for retirees. The city was required to pay more into the plans. 

Back in May, the Illinois Supreme Court struck down a state pension-cutting law. The court ruled that the measure violated the Illinois Constitution's pension clause, which states that contractual pension benefits cannot be reduced.

That Supreme Court decision guided the Cook County judge in her ruling against Chicago's pension measure.