Microsoft, the software firm that began requiring its U.S. suppliers to offer paid time off three years ago, now says that they must compensate employees for at least three months of parental leave as well.

The new policy, to be implemented over the next year, obligates suppliers to pay salaries of up to $1,000 a week to men and women who take time off for the birth or adoption of a baby, the Redmond, Wash.-based company said in a statement. The minimum standard will apply to businesses with more than 50 employees who do “substantial work” for Microsoft, but it doesn’t supplant state laws with more generous provisions.