Security deposit increase for NYC lease renewal

Hi everyone, I am a first-time landlord in the process of renewing the lease with my current tenants. The rent will be increasing by $100 and I'm just wondering if it's fine to request a check for the additional $100 security deposit or if I need to withdraw and return the current security deposit and request a check for the new amount?  I was seeing information online that suggested both routes...

Thanks in advance for the help!