How to update softmodded wii

[realg123]

I've been having issues trying to connect my softmodded wii online. The connection works but I keep getting a message "User agreement message" but I can't agree to it cause it wont take me there or when I do it manually I still get the same message.

So I read a bit and people suggested to update the wii. I know its not safe to update a modded wii using nintendo is there any other way?