Beginning Tuesday in the U.S., U.K., Canada and Australia, anyone under under 18 who signs up for Instagram will be placed into a teen account and those with existing accounts will be migrated over the next 60 days. Teens in the European Union will see their accounts adjusted later this year.

Nearly three years after the explosive “Facebook Papers” first drew mass attention to the risks of Instagram for young users, the platform is taking its most dramatic step yet to create a safer experience for teens.

Starting today, Instagram will begin putting new and existing users under the age of 18 into “Teen Accounts” — a move that will affect how tens of millions of teens interact with the platform. The new account type automatically applies a set of protections to young users, and only users 16 years of age and older can loosen some of these settings.