How to Upgrade RunCell

Upgrade runcell

To upgrade runcell to the latest version, run:

pip install runcell --upgrade

If you're using uv:

uv pip install runcell --upgrade

Make sure you run the command in the same environment where JupyterLab is installed.

Restart JupyterLab after upgrading

runcell includes both frontend and backend components. After upgrading, you must fully restart JupyterLab (a browser refresh is not enough).

1. Stop the running JupyterLab process using one of these methods:
   • Run jupyter lab stop in a new terminal window, or
   • Press Ctrl + C in the terminal where JupyterLab is running
2. Start it again:

jupyter lab

Alternatively, you can select Restart Server from the JupyterLab menu if available.

Verify the upgrade

pip show runcell

Check that the version matches the latest release.