How to extend the energe upper limit of Physics Lists

Hello, I am now trying to use Geant4 simulation some particles, both em and hadron, with energy higher than 100 TeV. Physics lists provided by Geant4, e.g. FTFP_BERT, have upper energy limit of 100 TeV for electromagnetic and hadronic process.
Is it possible to extend this upper limit to higher value, like 1 PeV or 10 PeV?
This may be not physical. So is there any more physical way to do this?


EM physics will be fine, hadronic physics do not have some high energy processes but should work technically.

in 10.7 there are UI commands:

/process/eLoss/maxKinEnergy 1 PeV
/process/had/maxEnergy 1 PeV