Vuckic is fully fit after recovering from a serious knee injury suffered last year.
He told nufc.co.uk: "I'm looking forward to pre-season and next season.
"I'm fit now, thank God. Everything's okay. It's been a long few months but now I'm fit and that's the most important thing.
"I've had a lot of bad luck in the past but hopefully now it's finished so I can be fit and focused just on football, playing games and training hard and I hope the gaffer's going to give me a chance."