slash

I'm currently a senior in Classics and Philosophy, and I'm finding out that while graduating this coming spring is possible, it doesn't appeal to me as the optimal outcome. I feel like I need more time to develop my languages, writing abilities, and build a stronger application for graduate programs among other things. I'm just wondering if application reviewers have a tendency to look unfavorably upon applicants who have taken five years to graduate instead of four. Is it going to hurt my chances of acceptance if I take another year?