From charlesreid1

After installing Kali from a USB drive with the rolling Kali image on it, you can upgrade to the latest Kali with the following command:

$ sudo apt-get install dist-upgrade

If you run into font issues (if, after upgrading Kali, your font replaces all the letters with little boxes), you can try opening a terminal and running:

$ apt --reinstall install fonts-cantarell