How do change this code so that it only hurts enemies?

I'm trying to change this code so that it only hurts enemies. I've tried to fix it myself. It still fires, but doesn't hurt anyone: local hitHums = {} exp.Hit:connect(function(part) local hum = (part.Parent or game):FindFirstChild('Humanoid') if hum and not hitHums[hum] then hitHums[hum] = true -- local tag = script.creator:Clone() game.Debris:AddItem(tag, 2) tag.Parent = hum hum:TakeDamage(45) end end)