It is important to keep your Indico instance up to date to have the latest bug fixes and features. Upgrading can be done with almost no user-facing downtime.


When upgrading a production system it is highly recommended to create a database backup before starting.

First of all, stop the Celery worker. To do so, run this as root:

systemctl stop indico-celery.service

Now switch to the indico user and activate the virtualenv:

su - indico
source ~/.venv/bin/activate

You are now ready to install the latest version of Indico:

pip install -U --pre indico

Some versions may include database schema upgrades. Make sure to perform them immediately after upgrading. If there are no schema changes, the command will simply do nothing.

indico db upgrade


Some database structure changes require an exclusive lock on some tables in the database. Unless you have very high activity on your instance, this lock can be acquired quickly, but if the upgrade command seems to hang for more than a few seconds, you can restart uWSGI by running systemctl restart uwsgi.service as root (in a separate shell, i.e. don’t abort the upgrade command!) which will ensure nothing is accessing Indico for a moment.

Unless you just restarted uWSGI, it is now time to reload it so the new version is actually used:

touch ~/web/indico.wsgi

Also start the Celery worker again (once again, as root):

systemctl start indico-celery.service

Upgrading from 1.9.11 to 2.0

Make sure that you have the latest 1.9.11 version installed and that you used indico db upgrade to have the most recent database structure.

To upgrade to 2.0, follow the upgrade instructions above. After successfully running the upgrade, use indico db reset_alembic to clear pre-2.0 database migration information, since all the old migration steps from the 1.9.x version line have been removed in 2.0.