Just updated my 40 STM using my 5D4, which isn't listed. No problem. On the Canon UK site here are the compatible cameras:
Canon EOS-1D X, Canon EOS-1D C, Canon EOS 5DS/5DS R, Canon EOS 6D, Canon EOS 5D Mark III (*1, *2), Canon EOS 7D Mark II, Canon EOS 70D, Canon EOS 760D/750D/700D/650D/100D or EOS M/M2/M3/M10
I would guess that any EOS camera body after about 2014 would work.