ST. PAUL, Minn. (AP) - Upgrading driver's licenses to satisfy the federal government could cost up to $5 million.

Minnesota lawmakers have clashed for years with the federal government over Real ID and the prospect of disrupted domestic flights if Minnesota doesn't comply. The Legislature recently repealed a 2009 law banning compliance with the law and ordered a study on the costs and time required for the upgrade.

The Department of Public Safety's report says it may cost between $4.3 million and $5.1 million to make the changes this year. Legislative leaders are pushing to have the new licenses in place by this fall.

Lawmakers were to get a look at the report Friday.