fitting assembly back together on 2007 Chrysler 300

I have replaced rotor - installed new pads in caliper and can not fit it back onto new rotor like the pads are too thick....need advice

Asked by for the 2007 Chrysler 300
You have to depress the piston back into the caliper, if it wont go back enough, the caliper may need to be replaced! Search youtube for a video if you can't figure it out! This needs to be done right!