Lawrence’s downtown post office is shortening its hours of operation.

Acting Postmaster Janie Magruder said the office at 645 Vermont St. would soon be open from 8 a.m. to 5 p.m. instead of the current hours of 8 a.m. to 5:30 p.m.

Magruder would not say when the change would go into effect, why the change is being implemented or whether the public could expect more changes in the future.

“It was an executive decision,” she said, declining to elaborate.

Postmaster Melissa Pfluke was out of the office and unavailable to comment.