diff --git a/.gitea/workflows/build-images.yaml b/.gitea/workflows/build-images.yaml
index 236552d..f49daf9 100644
--- a/.gitea/workflows/build-images.yaml
+++ b/.gitea/workflows/build-images.yaml
@@ -52,12 +52,6 @@ jobs:
               git.ajpanton.se/ajp_anton/ai-tools-utils:latest
             build_args: |
               PYTHON_VERSION=3
-          - name: ai-tools-utils-3.13
-            context: ai-tools-utils
-            tags: |
-              git.ajpanton.se/ajp_anton/ai-tools-utils:3.13
-            build_args: |
-              PYTHON_VERSION=3.13
 
     steps:
       - name: Check out repository
diff --git a/README.md b/README.md
index cea1cd7..986591e 100644
--- a/README.md
+++ b/README.md
@@ -69,9 +69,9 @@ final runtime image.
 
 Base image:
 
-- `python:3` for the `:3` and `:latest` tags.
-- `python:3.13` for the `:3.13` tag.
-- Minor and patch releases are picked up when each image is rebuilt.
+- `python:3`
+- The image follows the moving Python 3 tag. When upstream Python 3 moves to a
+  new minor release, this image follows it on the next rebuild.
 
 Installed from Debian apt repositories:
 
@@ -96,7 +96,6 @@ Descriptive tags:
 
 - `git.ajpanton.se/ajp_anton/postgres-custom:18-postgis3-vchord0.5.3`
 - `git.ajpanton.se/ajp_anton/php8-pgsql:8-fpm-alpine`
-- `git.ajpanton.se/ajp_anton/ai-tools-utils:3.13`
 
 Convenience tags: