Dunn said getting another two-year deal like the one he signed in February 2009 wouldn't necessarily be his preference, but he wouldn't be opposed to it.
"It would probably be over two. We'll see what happens " Dunn said.
Entering Thursday's action against the Rockies, Dunn was hitting .256 with a team-leading seven home runs and 17 RBIs.
Dunn, not known for his defensive prowess, has also has improved dramatically with the glove. He entered Thursday with only three errors in 34 games.
Asked if he has proven that he should stay in the National League, Dunn said, "If I was going out to help this team, that's what I needed to do, is to get better defensively. And that's what I work on."