Rules about raising market rent on long term tenant Providence RI

[Tina Rubin]

Scenario: Tenants who have been living in a unit for 10 years and paying $1K and the identical unit is renting for $1800. The tenants are month to month with no lease. Wondering the best approach to raise them to market rents. Looking for specific advise for this location. After initial RI Tenant Laws review, didn't see anything called out either way. Would like advice on how others successfully managed a similar situation.