Facebook CEO Mark Zuckerberg will be the sole witness to testify before the House Financial Services Committee on October 23 during a hearing on the company’s plans to launch its own cryptocurrency.

Members of the committee had been in talks over whether to allow Zuckerberg to skip the hearing and instead hear from Facebook COO Sheryl Sandberg, but several members pushed for the CEO to appear instead.

The hearing, titled “An Examination of Facebook and Its Impact on the Financial Services and Housing Sectors,” comes three months after Chair Maxine Waters and committee Democrats sent a letter to Facebook calling on the company to suspend plans to launch the cryptocurrency, Libra. The company is also working on a program called Calibra, which would function as a digital wallet for the cryptocurrency.