Abstract: A reinforcing plate includes a central portion having a centrally disposed longitudinal axis and a plurality of sidewalls. The central portion further includes a substantially rectangular slot for receiving a deadbolt therethrough. The sidewalls include a plurality of holes for receiving fastening members for attachment to a door frame. The plurality of sidewalls extend outwardly and away from the central portion and a door frame, forming a substantially U-shape. In an alternate embodiment, the central portion includes a female portion with an edge portion having a slot formed therein. The central portion further includes a male portion with an edge portion positionable within the slot of the female portion, so that the width of the central portion can be selectively adjusted in a direction substantially perpendicular to the axis and to fit a variety of framing studs.