Anyway of getting hamsters to live longer?

hello :) i have a male syrian hamster and i have had him for 2 yrs and 5 months i ain't sure what age he was when i got him as he wasn't baby i adopted him. hes in good health and hes not sick or anything i was just wondering if there is any tip on how to make them live loooong lol i really don't want the little fella to die anytime soon any help would be great :)