Offer arrived, can I still ask for more?, warehouse supervisor here

I received an offer as a warehouse supervisor and I think the pay is a little low. There are 4 people counting on me, so I am trying to be careful. The benefits are decent. Did it backfire?

I thanked them and said I was excited but hoped we could talk about the pay. They came back with a bit more.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.