Helm: migrate chart dependencies from HTTPS to OCI

08 Jan, 2025 • 63 words • 1 min • updated 03 Jan, 2026

⚠️ This post is over one year old. It may no longer be up to date or relevant. Opinions may have changed.

I got aware of this due to Bitnami’s blog post.

In Chart.yaml, instead of depending on:

- https://charts.bitnami.com/bitnami/airflow-18.3.2.tgz

Instead, depend on:

- oci://registry-1.docker.io/bitnamicharts/airflow:18.3.2

The switch is transparent, it works out-of-the-box.

However there’s one caveat: You cannot helm repo add oci://registry-1.docker.io/bitnamicharts. That only works for https:// registries.

The workaround is to helm pull oci://[...] --version {version} and/or to browse available tags/versions via docker hub.