A small group of Stanford University students and others ended a nine-day hunger strike on Friday, after Stanford agreed to extend its living-wage policy to cover all contract workers, even those hired on a temporary basis and those who work less than 30 hours a week.

By September 1, such workers will get a minimum wage of at least $11.15 per hour with benefits and $12.59 per hour without benefits, the university said in a news release. The living-wage policy covers about 125 to 150 maintenance, groundskeeping, housing, and food-service workers. The number of additional workers who will be covered by the policy changes is not clear.

Stanford said it would create a list of “preferred contractors” who have agreed to pay the living wage to its workers, even if the policy does not require it. University departments will be “strongly encouraged” to use one of the contractors on the list.

The university did not extend the living-wage policy to two other groups: unionized workers and workers employed by a company where the aggregate value of its contracts with the university is less than $100,000. —Audrey Williams June