Updating jQuery

Updating jQuery

Hello awesome forum!
I am currently working on developing my new site justmoney.dk, where jQuery is used to most of the action. All of my javascript is in one file, containing the most recent jQuery version out there. My question is: would it be an idea to refer jQuery separately, rather than mixing the two, in order to have the most recent version? Or doesn't it matter at all?
Thanks for your replies.
Peter