The state of emergency, which was imposed after a suicide attack on a police bus in November 2015, runs for three months after being extended on November 10.
The Foreign Office (FCO) has updated its travel advice to the destination to include the change.
The FCO relaxed its advice against all but essential to large parts of Tunisia in June, including Tunis and the beach resort of Sousse, paving the way for Thomas Cook to reinstate its holidays and flights programme from February 2018.
The move followed a so-called "travel ban" on the country from the UK in the wake of the Sousse beach massacre in June 2015.
