If your landlord is trying to increase your security deposit with respect to the rent control unit you have after being there five (5) years, whether the landlord can contractually receive the $200 increase depends upon what the lease that you have with him or her states and what the entity overseeing the rent control of your unit requires.As such, I would carefully read your written lease with your landlord assuming you have one and then contact the entity overssing the rent control of your unit. From there, you would be in a position to get the information to ascertain whether your landlord is entitled to have you pay an additional $200 towards your security deposit.My inclination is that the landlord cannot contractually demand the extra $200. The amount of the security deposit would have been taken care of in the lease when you first moved into the rental that you have.