San Francisco officials are trying to lower crime in one of the city’s most dangerous neighborhoods by setting a curfew for businesses.

The city’s Board of Supervisors gave final approval Tuesday to a pilot program that will shorten business hours in Tenderloin, known for its homelessness, drug use and violence.

Businesses that sell prepackaged food or tobacco will no longer be allowed to stay open from midnight to 5 a.m. during the two-year pilot. The new ordinance doesn’t apply to restaurants and bars.