diff --git a/{{cookiecutter.project_slug}}/compose/local/django/Dockerfile b/{{cookiecutter.project_slug}}/compose/local/django/Dockerfile
index f1a489a30..044ef4a74 100644
--- a/{{cookiecutter.project_slug}}/compose/local/django/Dockerfile
+++ b/{{cookiecutter.project_slug}}/compose/local/django/Dockerfile
@@ -1,4 +1,4 @@
-ARG PYTHON_VERSION=3.9-slim-buster
+ARG PYTHON_VERSION=3.9-slim-bullseye
 
 # define an alias for the specfic python version used in this file.
 FROM python:${PYTHON_VERSION} as python
diff --git a/{{cookiecutter.project_slug}}/compose/local/docs/Dockerfile b/{{cookiecutter.project_slug}}/compose/local/docs/Dockerfile
index fbb5ce9d0..215cca61b 100644
--- a/{{cookiecutter.project_slug}}/compose/local/docs/Dockerfile
+++ b/{{cookiecutter.project_slug}}/compose/local/docs/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9-slim-buster
+FROM python:3.9-slim-bullseye
 
 ENV PYTHONUNBUFFERED 1
 ENV PYTHONDONTWRITEBYTECODE 1
diff --git a/{{cookiecutter.project_slug}}/compose/production/django/Dockerfile b/{{cookiecutter.project_slug}}/compose/production/django/Dockerfile
index 5f1bc78b3..fa969f1c8 100644
--- a/{{cookiecutter.project_slug}}/compose/production/django/Dockerfile
+++ b/{{cookiecutter.project_slug}}/compose/production/django/Dockerfile
@@ -1,4 +1,4 @@
-ARG PYTHON_VERSION=3.9-slim-buster
+ARG PYTHON_VERSION=3.9-slim-bullseye
 
 {% if cookiecutter.js_task_runner == 'Gulp' -%}
 FROM node:10-stretch-slim as client-builder