As many as 87 million Facebook users, mostly in the US, were impacted by the Cambridge Analytica data-sharing scandal.  That’s 37 million more people affected than previously thought.  Facebook announced Wednesday that it will severely restrict third-party access to its users’ data and will alert those whose personal data may have been compromised. The social media giant made nine changes to the company’s data-sharing policy, updating its terms and conditions for the first time since 2015.

According to The Wall St. Journal, Facebook CEO Mark Zuckerberg made a confession during a conference call with reporters:

“Chief Executive Officer Mark Zuckerberg said he made a “huge mistake” in not focusing more on potential abuse, as he and the social-media giant he founded continue to battle concerns about privacy and trust.”

Mark Zuckerberg will now testify before the House Energy and Commerce Committee on April 11.