Should I upgrade firmware, or is it even possible.

So I have some Hikvision 3MP bullet cameras.

I think their the DS-2CD2032

Chinese versions but everything has been fine and I got them in english.

I bought them back in like 2013. Maybe 2014.

Is there any update I could do to expect better performance/Image or anything.

I plan on upgrading the cameras but I figured I don't want to be missing out on the ones I have.

Thanks