Figured it out
I installed a program called xkeycaps which allows you to graphically remap keys. This creates a hidden file in your home dir called .xmodmap-blablah. To make it persistent across reboots you need to create a script with the command “xmodmap /home/user/.xmodmap-blahblah” and have that script automatically run on startup.
I am not sure if this is the best way to do this, but it works for me.