[Illinois] How to transfer gun ownership of someone who recently passed away?

I'm not finding the information I need. I was wanting to know if I needed to do anything special to transfer the ownership of this firearm into my name. This was my dad's gun, I have my FOID card, and before I make some calls just wanted to see if anyone had any information that could help me out. Thanks via /r/CCW http://ift.tt/2eSQwn7