By CBS3 Staff

PHILADELPHIA (CBS) — On Wednesday, custodians and housekeepers with Teamsters Local 15 at the University of Pennsylvania will rally for better wages. 

More than 500 workers are demanding pay increases to keep up with inflation and they want an end to two-tier wages that leave some housekeepers making $5 less per hour for doing the same work.

University of Penn’s contract with the union is up at the end of the month.