Unionized workers at Canada's largest zoo ratified a new four-year collective agreement on Sunday.
The Toronto Zoo Board of Management announced Monday that it too had ratified the accord.
Management staff have been caring for the zoo's 5,000 animals during the contract dispute.
Staff are set to return to work Tuesday to prepare the zoo for opening to the public.
During the strike, more than 400 unionized employees had cited job security concerns as their main grievance.