How do you reach settlement level 6?

I have built everything in my settlement and upgraded everything. The only things that haven't been upgraded are the building that require foreign raw supplies you get from the river raids which don't count right because it's DLC? I still have raw materials and supplies left over so there's no way I have upgraded everything but when I check with synin, everything is white and no green markers show up.

Edit: I am half way through level 5. So just half a bar to go to completion.