Can landlord double your rent?

Hello I’m in Missouri and recently received a call from my front office and they offered us a renewal which we have not been on in years. We rolled over into a month to month and it was a reasonable price so we kept it. In this call though the lady said it could potentially double. They have not renovated the inside of our units besides like an annoying light switch. Is this legal? And can we do anything about it if they try to pull something like this?