OpenAI CEO Sam Altman testified before members of the Senate on Tuesday about the risks from artificial intelligence advancements, encouraging lawmakers to implement regulations.

ChatGPT, a mass-market AI system developed by OpenAI, has gained widespread popularity over the last six months as knowledge workers use the tool to complete tasks such as writing code and drafting emails in a matter of seconds. Altman, who dined on Monday evening with five dozen lawmakers, said in opening remarks before the Senate Judiciary Committee on Tuesday morning that he knows the firm’s technology will have “profound impacts” on the world.