Do both weapons need to be light to gain the bonus attack?

@JeremyECrawford Wait, I thought only the second weapon had to be light? Do both weapons need to be light to gain the bonus attack?

— Noel Mock (@NoTMock) March 9, 2016

In two-weapon fighting, both weapons must be light, unless you have a feature like the Dual Wielder feat. #DnD https://t.co/aPqvZmjskj

— Jeremy Crawford (@JeremyECrawford) March 10, 2016