TimescaleDB upgrade within a docker container, new DBs are created with old TimescaleDB version

I decided to upgrade TimescaleDB from version 2.9.3 to version 2.14.2.
I followed the upgrade documentation here: https://docs.timescale.com/self-hosted/latest/upgrades/upgrade-docker/

Everything was OK. My databases upgraded TimescaleDB to a newer version successfully. But when I create a new database it's created with the old 2.9.3 TimescaleDB version and I need to execute ALTER EXTENSION timescaledb UPDATE; every time I create a new database. Is there a way to fix this? Why doesn't it use 2.14.2 version?