How can i play online?

Yo! Ever since I hacked my PS3, there has been a few updates that got released for it. I never updated it though, because everyone told me that it would mess with the hacks.

Basically, I'm stuck on an old version of the ps3's software.

But since playing online requires that the ps3 is updated, I can't play Minecraft Leagcy Edition with my friends anymore... What should I do to fix that?