Snapchat is adding new features meant to discourage teens from interacting with strangers on its app. The changes come after years of scrutiny on the app as lawmakers and other officials have questioned Snap’s ability to keep teens safe.

As with previous updates, the new restrictions primarily affect the accounts of 13- to 17-year-olds on the app. Last year, the company began limiting the visibility of teens’ accounts in its “Quick Add” recommendations to limit strangers’ ability to find young people in the app. Now, the company says it will make teens even harder to find in search and recommendations by increasing the number of mutual friends users must have in order to appear in search and suggested accounts.