Facebook announced that it is banning the private sale of firearms on its social network, which can take place without background check.

The change in policy on Friday follows increased pressure from the US government and anti-gun organizations for the company to crack down on peer-to-peer sales on its site.

While licensed firearm retailers will still be able to advertise on the site, the updated policy will forbid individual users from coordinating peer-to-peer sales of guns. Facebook already prohibits the private sale of marijuana, pharmaceuticals, and illegal drugs.

“Over the last two years, more and more people have been using Facebook to discover products and to buy and sell things to one another,” Monika Bickert, Facebook’s head of product policy, said in a statement. “We are continuing to develop, test, and launch new products to make this experience even better for people and are updating our regulated goods policies to reflect this evolution.”