(Springfield, IL) -- Ameren customers will be dishing out a little more cash if they refuse to upgrade to advanced meters. The Illinois Commerce Commission has given Ameren the green light to charge people 20-bucks if they don't comply with the upgrades. Company officials say they'll make several attempts to contact the customer before assessing the fee. The new meters are being installed now and the process will continue through 2019. Anyone who'd like to avoid the charge can call the company to schedule a meter exchange at no cost.