You can grab the latest proprietary NVidia drivers from:
https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa
To add the PPA you will need to install software-properties-common with:
sudo apt install software-properties-common
Then:
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt update
For the latest (short lived) NVidia driver:
sudo apt install nvidia-396
