KANSAS CITY, Mo. (AP) — A proposal by the Kansas City Council to boost the minimum wage is facing challenges from two groups.

The Kansas City Star reports the Kansas City Council on Thursday took a step to seek voter input in November on a group’s petition to increase the city’s minimum wage to $15 an hour. That proposal is supported by civil rights groups seeks to raise the minimum wage to $10 per hour on Sept. 1 and to $15 per hour by 2020.

The council has adopted its own ordinance to increase the city’s minimum wage to $13 per hour by 2020.

The council ordinance hasn’t become law because another group of petitioners representing businesses has also started a referendum drive to overturn it.