Photo courtesy of the National Capital Planning Commission

The National Capital Planning Commission has approved final designs for a new perimeter fence and gates around the White House. The new fence will be about four feet taller than the current structure, which has seen numerous jumpers—most prominently a man who made it over and entered the White House through an unlocked door in 2014.

The fence will be 11 feet, seven inches—this includes “pencil point” anti-climb fixtures at the top of the structure, according to a NCPC release. In addition, the vehicle gates will be crash-tested, and pedestrian gates will have a “vertical picket concept.”

The design plan “accomplishes national security goals while simultaneously preserving the character of the unique public space that surrounds the Executive Residence,” said Secret Service Chief Strategy Officer Thomas Dougherty.

A December 2014 security report concluded that a better, taller fence needed to be erected “as soon as possible.”

And in May 2015, officials began installing temporary deterrents such as a second layer of steel spikes on top of the fences. But on Thanksgiving Day that year, Joseph Caputo, who wrapped himself in an American flag, still managed to jump over the fence. A judge has since sentenced him to three years of probation.

The U.S. Secret Service and National Park Service submitted an initial design proposal for the new fence and gates to the NCPC and the Commission of Fine Arts last April, received feedback, and refined the concept over the next several months.

The agencies plan to start construction in 2018.

The fence upgrades are the first phase of a comprehensive security plan, which also includes enhancements to the Eisenhower Executive Office Building and the Treasury Building.