The House of Representatives overwhelmingly voted Tuesday to impose new restrictions on travel to the United States, which bill proponents said is designed to prevent terrorists from lawfully entering the country.

The bill, approved by a 407-19 margin, is geared to reform the United States’ Visa Waiver Program, which allows eligible citizens from 38 participating countries to travel to the country for 90 or fewer days without first getting a visa from a United States embassy or consulate.

The list of countries includes Belgium and France, according to the State Department. Those countries were the home of many of the terrorists who executed the Nov. 13 attacks in Paris. The legislation is designed to close a loophole that, theoretically, could have allowed any one of those Belgian or French terrorists from entering the United States through the Visa Waiver Program.

The Associated Press reported about 20 million travelers visit America through the program every year. There are some security measures in place, but this bill aims to improve them.

The changes would now require the 38 participating countries to “continually share terrorism and foreign traveler data with the United States,” according to a news release from lawmakers.

“It will also disqualify anyone who has traveled to Syria, Iraq, Sudan, and Iran within the past five years from participating in the program,” Rep. Candice Miller (R-Michigan), the lawmaker who introduced the bill, said on the House floor. “In an abundance of caution, we will now require those individuals to apply for a visa and go through the formal visa screening process.”

In the week before the vote, the House’s Homeland Security Committee Chairman, Michael McCaul (R-Texas), said about 5,000 of the 30,000 foreign fighters currently in Iraq and Syria have Western passports that could have been used to exploit the Visa Waiver Program loophole.

Other proposed changes to the program are geared toward reducing passport fraud.

They include requiring the participating countries to report lost or stolen passports within 24 hours, and screen travelers against INTERPOL records. The changes would also require U.S.-bound travelers to hold chip-enabled “e-passports” like those issued by the United States.

The bill would allow Homeland Security officials to suspend a country’s visa waiver privileges if they don’t comply with the proposed rules, like not sharing information about potential threats. They could also block any country from the program if the country is later determined to be a “high-risk” area in security reviews that would be conducted annually.

“We need to be certain that participating countries are giving us all the information we need from either their own terror watch lists or travel manifests and that the information protocols are being shared,” Miller said on the House floor. “As we know, sometimes it’s not until after the fact that some of the participating countries actually provide us names of individuals who they knew were a terror threat. That is unacceptable.”

Though it was approved by the House, the bill still needs Senate approval and must be signed by the president before it becomes a law. Lawmakers have introduced a similar bill in the Senate.

Miller also called for a “complete, comprehensive review of all our visa programs,” including the fiancee-visa that allowed one of the shooters in the San Bernardino, California, mass shootings to lawfully enter the country. Tashfeen Malik was a Pakistani native living in Saudi Arabia when she met Syed Rizwan Farook, a United States citizen, reportedly on an online dating website.

Last week, the couple killed 14 people and injured 21 more during a party for Farook’s coworkers. The mass shooting has been called an act of terrorism by President Barack Obama, and authorities say they have evidence that the couple had been radicalized for a period of time.

The investigation into the shootings continued on Wednesday.