@@ -23,7 +23,7 @@ jobs:
 password: ${{ secrets.DOCKER_PASSWORD }}
 repository: matthewfeickert/docker-python3-ubuntu
 dockerfile: Dockerfile
-tags: latest,3.8.7
+tags: latest,3.9.10
 - name: Build and Publish to Registry with Release Tag
 if: startsWith(.ref, 'refs/tags/')
 uses: docker/build-push-action@v1

@@ -5,7 +5,7 @@ WORKDIR /root
 
 SHELL [ "/bin/bash", "-c" ]
 
-ARG PYTHON_VERSION_TAG=3.8.7
+ARG PYTHON_VERSION_TAG=3.9.10
 ARG LINK_PYTHON_TO_PYTHON3=1
 
 # Existing lsb_release causes issues with modern installations of Python3

@@ -1,27 +1,27 @@
 default: image
 
-all: image py_3.8.7 py_3.8.3 py_3.8.1 py_3.8.0 py_3.7.4 py_3.6.8
+all: image py_3.9.10 py_3.8.3 py_3.8.1 py_3.8.0 py_3.7.4 py_3.6.8
 
 image:
 docker build . \
 --pull \
 -f Dockerfile \
 --cache-from matthewfeickert/docker-python3-ubuntu:latest \
---build-arg PYTHON_VERSION_TAG=3.8.7 \
+--build-arg PYTHON_VERSION_TAG=3.9.10 \
 --build-arg LINK_PYTHON_TO_PYTHON3=1 \
 -t matthewfeickert/docker-python3-ubuntu:latest \
--t matthewfeickert/docker-python3-ubuntu:3.8.7 \
+-t matthewfeickert/docker-python3-ubuntu:3.9.10 \
 --compress
 
-py_3.8.7:
+py_3.9.10:
 docker build . \
 --pull \
 -f Dockerfile \
 --cache-from matthewfeickert/docker-python3-ubuntu:latest \
---build-arg PYTHON_VERSION_TAG=3.8.7 \
+--build-arg PYTHON_VERSION_TAG=3.9.10 \
 --build-arg LINK_PYTHON_TO_PYTHON3=1 \
 -t matthewfeickert/docker-python3-ubuntu:latest \
--t matthewfeickert/docker-python3-ubuntu:3.8.7 \
+-t matthewfeickert/docker-python3-ubuntu:3.9.10 \
 --compress
 
 py_3.8.3:

@@ -1,6 +1,6 @@
 # Python3 on Ubuntu Docker
 
-Dockerfile for image built off [Ubuntu 20.04](https://wiki.ubuntu.com/FocalFossa/ReleaseNotes/20.04) containing [Python 3.8](https://www.python.org/downloads/release/python-387/) ([Python 3.6](https://www.python.org/downloads/release/python-368/), [Python 3.7](https://www.python.org/downloads/release/python-374/)) built from source
+Dockerfile for image built off [Ubuntu 20.04](https://wiki.ubuntu.com/FocalFossa/ReleaseNotes/20.04) containing [Python 3.9](https://www.python.org/downloads/release/python-3910/) ([Python 3.6](https://www.python.org/downloads/release/python-368/), [Python 3.7](https://www.python.org/downloads/release/python-374/), [Python 3.8](https://www.python.org/downloads/release/python-387/) built from source
 
 [![ Actions Status: CI](https://.com/matthewfeickert/Docker-Python3-Ubuntu/workflows/CI/badge.svg?branch=master)](https://.com/matthewfeickert/Docker-Python3-Ubuntu/actions?query=workflow%3ACI+branch%3Amaster)
 [![Docker Automated build](https://img.shields.io/docker/automated/matthewfeickert/docker-python3-ubuntu.svg)](https://hub.docker.com/r/matthewfeickert/docker-python3-ubuntu/)
@@ -37,4 +37,4 @@ Dockerfile for image built off [Ubuntu 20.04](https://wiki.ubuntu.com/FocalFossa
 
 ### From source
 
-- Python 3.8 (3.6, 3.7)
+- Python 3.9 (3.6, 3.7, 3.8)

@@ -29,6 +29,7 @@ function build_cpython () {
 # 2: the Python version being built
 
 # https://docs.python.org/3/using/unix.html#building-python
+# https://.com/python/cpython/blob/3.9/README.rst
 # https://.com/python/cpython/blob/3.8/README.rst
 # https://.com/python/cpython/blob/3.7/README.rst
 # https://.com/python/cpython/blob/3.6/README.rst
@@ -78,7 +79,7 @@ function symlink_python_to_python3 {
 local python_version
 python_version="$(python3 --version)"
 local which_python
-which_python="$(command -v python3)${python_version:8:-2}"
+which_python="$(command -v python3)${python_version:8:2}"
 local which_pip
 which_pip="$(command -v pip3)"
 
@@ -101,7 +102,7 @@ function main() {
 # 1: the Python version tag
 # 2: bool of if should symlink python and pip to python3 versions
 
-PYTHON_VERSION_TAG=3.8.7
+PYTHON_VERSION_TAG=3.9.10
 LINK_PYTHON_TO_PYTHON3=0 # By default don't link so as to reserve python for Python 2
 if [[ $# -gt 0 ]]; then
 PYTHON_VERSION_TAG="${1}"