Chicago's Ventra system is set to undergo a system upgrade overnight Friday into Saturday morning, which will take all their readers offline.

The outage is planned from 11 p.m. Friday, Oct. 17 until 11 a.m. Saturday, Oct. 18. During that time, all Ventra services will temporarily unavailable, including their call center, website, mobile app and ticket vending machines, the company said.

During this 12 hour window, all riders will be given complimentary rides and will not need to tap their Ventra cards or method of payment to get through rail station turnstiles or onto buses, the company said on their website.