Colorado Secretary of State Wayne Williams on Monday said that the state would ensure ballot integrity by auditing the results of future elections.

Politico reported that the state will contract with election security firm Free & Fair to design software that compares paper ballots to the official electronic tallies. The software will also be made available to other states.

In a statement, Williams said that the audit will ensure election integrity “with a high level of statistical probability that has never existed before.”

According to U.S. intelligence officials, Russian hackers made an unprecedented number of attacks on American elections systems in 2016. Officials are bracing for cyber attacks to increase during the 2018 elections.