diff --git a/README.md b/README.md
index d43ead0..851b8e5 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Read the full documentation online: <https://docs.calitp.org/docker-python-web>
 
 ## Features
 
-- Base image `python:3.11`
+- Base image `python:3.12`
 - Image configured with non-`root` user (`calitp` by default)
 - `nginx` configured as a reverse proxy listening on container port `8000`
 - `gunicorn` configured as a WSGI application server, communicates with `nginx` over Unix socket
diff --git a/appcontainer/Dockerfile b/appcontainer/Dockerfile
index 1c33457..6cac155 100644
--- a/appcontainer/Dockerfile
+++ b/appcontainer/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.11
+FROM python:3.12
 
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1 \
diff --git a/docs/README.md b/docs/README.md
index e215230..5f47a68 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -8,7 +8,7 @@ This is the documentation site for [`cal-itp/docker-python-web`](https://github.
 
 ## Features
 
-- Base image `python:3.11`
+- Base image `python:3.12`
 - Image configured with non-`root` user (`calitp` by default)
 - `nginx` configured as a reverse proxy listening on container port `8000`
 - `gunicorn` configured as a WSGI application server, communicates with `nginx` over Unix socket