The 31-year-old’s current three-year contract ended at the end of the season and was receiving interest from Newcastle.
But Luke said at last week’s Dally M awards he wanted to stay at the Warriors and is happy to put pen to paper on a new deal.
“It’s good to have the contract all sorted out,” Luke told the Warriors website.
“We always wanted to stay in New Zealand, my wife and the kids. I’m really happy here at the club and I’m pleased I have another season with the boys.”
Warriors coach Stephen Kearney welcomed Luke’s re-signing.
“We wanted Issac to stay. It was just a matter of sorting out the details,” Kearney told the Warriors website.
“Now we look forward to him making a big contribution to the side next season.”
Luke played 23 games for the Warriors in 2018, scoring six tries and averaging 31 tackles a game.