Is this my way out of a lease agreement??

[Allen McGlashing]

Hey guys so I inherited my tenants and now one wants to bring in a roommate I vetted him and everything came back great. I was wondering with adding him can I change the current lease to a new one? Currently the lease is a 12 month lease I want to change that to a month to month lease also with $50 a month increase in rent. I just don't really like to be stuck with a fixed lease especially in my market that apartments are in high demand.