If you’re one of the people secretly sharing your Netflix password with friends and family, the streaming service might soon be on to you.

Software maker Synamedia, which is based in the United Kingdom, looks for potentially fraudulent activity.

If it finds something, it would ask you to upgrade to a premium account that includes sharing.

If passwords are sold, accounts could be shut down.

The system is in the testing phase.

The company said one in four people share their credentials for video streaming services.