Raising rent one unit at a time, or does it have to be standard?

[Cody F.]

I have an apartment complex with 41 units. It's a mix of 1,2, and 3 bedroom units. I want to start raising rents as I renovate each unit but I'm worried about the legalities of that. Can I potentially get in trouble for charging more for one than another? Like say I charge 600 for one 3br but only charge 550 for a different 3br. Could a tenant call discrimination or something for charging one tenant more than another for the same amount of rooms?