Amid criticism over the way it handles customer information, Facebook made changes to the way users can join group chats in Messenger. The company said Wednesday it now requires people trying to get into a group chat to be approved by an admin.

Facebook says this will be useful for large group chats where all the members may not be connected. Admin abilities can also be adjusted between users. Group chats support up to 250 members. Users can be invited with a new sharable link, the company says.

“Anyone in a group chat can create a custom invite link and share it with someone they’d like to join the conversation,” Facebook wrote in its press release. “People who tap the link will either be added to the group automatically if approvals are off, or will be added once the admin has approved the request.”

New features to Messenger are great, but Facebook has other security issues that need work, too.