DENVER—A Colorado elections overhaul that includes same-day voter registration and mailing ballots to all voters is being signed into law.

Democratic Gov. John Hickenlooper plans to sign the bill Friday afternoon.

Democrats who sponsored the legislation say the goal is to enfranchise more voters and make it easier to vote. But Republicans have raised concerns about voter fraud and no GOP lawmakers voted for the bill.

With the bill, every registered voter will get a ballot by mail, but they could still vote in person. They could vote at any of the voting centers established by the bill, instead of the current system of going to a designated precinct polling place.

The bill would also eliminate the category of "inactive" voters, which restricts their ability to get ballots by mail.