You didn’t give much information but your problem could be the packing nut on your hot faucet stem needs to be tightened a bit. If you remove the handle you should see a stem with a nut near the bottom that holds it into the manifold. Carefully tighten that nut just a bit then slide the handle back on to try the faucet again. If it still seeps a bit you can repeat tightening the nut a little each time until the leaking stops. Good luck.