Current lockdown restrictions here will last until March 5.
A review of the measures put in place to reduce the COVID-19 rate will be held on 18 February.
Schools are currently closed to pupils until the half-term break in February.
Warnings remain about hospitals facing severe pressure.
Further lockdown measures could stretch to Easter.
First Minister Arlene Forster said extending the restrictions is an ‘appropriate and necessary response’ in the fight against the virus.