The Eagles bounced back from a 4-12 record in the 2012 campaign to reach the post-season in Kelly's first year as head coach, where they were defeated by the New Orleans Saints in the wildcard round.
The 50-year-old is adamant that his side can do better than the 10-win team of last season.
"We were just ok," Kelly told the Delaware County Daily Times. "You've got to make sure that they're not content being where they are. I think if you're content with 10 wins and winning the division you're probably shortchanging yourself and the team.
"We did that. What's the next step? How can we improve upon that? We're trying to get a bunch of guys that are never complacent in terms of, 'All right, we've arrived.'
"We haven't arrived. We're looking to work and strive to get better and better and better. That's part of the deal. So I think that's the thing we're always trying to emphasize with these guys."
The Eagles finished with a 10-6 record and won the NFC East title last season.