State election officials say they are working to ensure the safety of your vote Tuesday.
The Department of Homeland Security says Oklahoma was one of 21 states targeted by Russian hackers in the 2016 election.
Since then, the Oklahoma Election Board has accepted more than $5-million in federal money to increase election security.
Officials say there is not a specific threat to Tuesday's election, but say they are being vigilant.
"The state Election Board and our partner agencies are communicating, cooperating and coordinating with each other and with federal agencies to identify any potential threats and take the steps necessary to protect against them," said Paul Ziriax, Oklahoma Election Board Secretary.
Tuesday is a runoff election with polls open 7 a.m. until 7 p.m. across the state.