diff --git a/docker/README.md b/docker/README.md
index f5a4c2b..6fb5135 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -27,19 +27,25 @@ e.g. `-v rpxy/ca-certificates:/usr/local/share/ca-certificates`
 
 Differences among tags are summarized as follows.
 
-### Latest Builds
+### Latest and versioned builds
 
-- `latest`: Built from the `main` branch with default features, running on Ubuntu.
-- `latest-slim`, `slim`: Built by `musl` from the `main` branch with default features, running on Alpine.
-- `latest-s2n`, `s2n`: Built from the `main` branch with the `http3-s2n` feature, running on Ubuntu.
-- `*-pq`: Built with the `post-quantum` feature. This feature supports the post-quantum key exchange using `rustls-post-quantum` crate.
+Latest builds are shipped from the `main` branch when the new version is released. For example, when the version `x.y.z` is released, the following images are provided.
 
-### Nightly Builds
+- `latest`, `x.y.z`: Built with default features, running on Ubuntu.
+- `latest-slim`, `slim`, `x.y.z-slim` : Built by `musl` with default features, running on Alpine.
+- `latest-s2n`, `s2n`, `x.y.z-s2n`: Built with the `http3-s2n` feature, running on Ubuntu.
 
-- `nightly`: Built from the `develop` branch with default features, running on Ubuntu.
-- `nightly-slim`: Built by `musl` from the `develop` branch with default features, running on Alpine.
-- `nightly-s2n`: Built from the `develop` branch with the `http3-s2n` feature, running on Ubuntu.
-- `*-pq`: Built with the `post-quantum` feature. This feature supports the hybridized post-quantum key exchange using `rustls-post-quantum` crate.
+Additionally, images built with `webpki-roots` are provided in a similar manner to the above (e.g., `latest-s2n-webpki-roots` and `s2n-webpki-roots` tagged for the same image).
+
+### Nightly builds
+
+Nightly builds are shipped from the `develop` branch for every push.
+
+- `nightly`: Built with default features, running on Ubuntu.
+- `nightly-slim`: Built by `musl` with default features, running on Alpine.
+- `nightly-s2n`: Built with the `http3-s2n` feature, running on Ubuntu.
+
+Additionally, images built with `webpki-roots` are provided in a similar manner to the above (e.g., `nightly-s2n-webpki-roots`).
 
 ## Caveats