Raising rent by double because I didn't raise rent before

[Vitaliy Merkulov]

I have a tenant that moved in on September 2016 that paid $1300 per month with an agreement that they would pay $1450 per month starting from January 2017. I never actually raised the rent to $1450 because they were immigrants and I wanted to give them some more time. Now, most 4 bedrooms are going at $2000 per month in our area. Can I raise rent to $1450 + 10% on top? Or I can only raise it to $1450 right now?