Can I upgrade anything in LP DELL INSPIRON 5558

[herri2003]

I own a LP DELL INSPIRON 5558 Black with 128 SSD 4gb RAM Intel core i3 5005u 2ghz, 3 mb and nividia George 920m 2gb and I want to upgrade something at this laptop.
What can I upgrade

 

[zoltan.boese]

hard drive, working memory banks, Wi-Fi module