Abstract: An apparatus that can be installed on an existing door to provide improved security. The apparatus has first and second door brackets that are installed on the interior and exterior surfaces of the door, respectively, and together increase the strength of the door in the region near the door handle and/or deadbolt. The apparatus also has a door frame bar that is installed on the door frame opposing a vertical outside edge of the door and one or more door hinge bars that are mounted on the interior surface of the door near one or more door hinges. The apparatus can optionally have a reinforcing bar.