diff --git a/README.md b/README.md
index 12cde22..58c51ea 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 Docker image with all dependencies installed, configured to be as close to
 GitHub actions as possible.
 
-The CI builds this image on pushes to `main` as `git.pub.solar/pub-solar/actions-base-image:$TAG`.
+The CI builds this image on pushes to `main` as `git.pub.solar/pub-solar/actions-base-image:20-bookworm`.
 
 Building the image locally: