Attorney General Eric Holder said America’s election system needs to be made “stronger and more accessible,” and defended the Justice Department’s challenges to restrictive voting laws.

In a speech at the John F. Kennedy Presidential Library in Boston, Holder criticized the country’s “antiquated registration system,” calling it the “single largest barrier” to American voters. He proposed that modern technology could help alleviate many problems, suggesting an updated voter registration system, coordinated between states, could rely on government databases and be portable, allowing voters to remain registered to vote even when they move.