Upgrade not upgrading

I’ve done an upgrade of tljh with

curl -L The Littlest Jupyterhub | sudo python3 - --version=latest

and after “upgrading” all jupyter core packages stayed on the same version.

“upgraded tljh”: ipykernel : 6.29.5

new instaled: ipykernel 6.30.1

so hows the proper way to upgrade a tljh installation?

regards jan