📦️ chore: upgrade to Python 3.13.9

- Update Dockerfile base image to python:3.13
- Update runtime.txt for Heroku deployment
- Update .tool-versions for local development
- Update all documentation files

Author: matrixise

.tool-versions

@@ -1,2 +1,2 @@
-python 3.12.11
+python 3.13.9
 task 3.37.2

CLAUDE.md

@@ -8,7 +8,7 @@ This is the Python Ireland (python.ie / pycon.ie) website, built with Django 5.2
 
 ### Python Version
 
-This project requires **Python 3.12**. All code must be compatible with Python 3.12 and should not use features from newer versions. When developing locally without Docker, ensure you are using Python 3.12.x.
+This project requires **Python 3.13**. All code must be compatible with Python 3.13. When developing locally without Docker, ensure you are using Python 3.13.x.
 
 ## Architecture
 

CONTRIBUTING.md

@@ -25,7 +25,7 @@ This project follows the [Python Community Code of Conduct](https://www.python.o
 
 ### Prerequisites
 
-- **Python 3.12** (required - do not use other versions)
+- **Python 3.13** (required)
 - **Docker** and **docker-compose** (recommended)
 - **Git**
 - **Task** (optional, for running predefined commands)
@@ -77,11 +77,11 @@ task run
 ### Option 2: Local Development
 
 ```bash
-# Ensure Python 3.12 is installed
-python3 --version  # Should show 3.12.x
+# Ensure Python 3.13 is installed
+python3 --version  # Should show 3.13.x
 
 # Create virtual environment
-python3.12 -m venv pythonie-venv
+python3.13 -m venv pythonie-venv
 source pythonie-venv/bin/activate
 
 # Install dependencies
@@ -158,7 +158,7 @@ refactor/simplify-sponsor-model
 
 ### Python
 
-- **Python version**: 3.12 (strict requirement)
+- **Python version**: 3.13 (strict requirement)
 - **Formatter**: Ruff
 - **Line length**: 88 characters (Ruff default)
 - **Imports**: Sorted automatically by Ruff
@@ -356,7 +356,7 @@ feat: Add speaker bio character limit validation
 
 fix: Resolve meetup sync timezone issue
 
-docs: Update installation instructions for Python 3.12
+docs: Update installation instructions for Python 3.13
 
 refactor: Simplify sponsor level ordering logic
 ```

DEVELOPMENT.md

@@ -24,7 +24,7 @@
 
 - **Framework**: Django 5.2.8
 - **CMS**: Wagtail 7.2
-- **Python**: 3.12 (required)
+- **Python**: 3.13 (required)
 - **Database**: PostgreSQL 17 (prod and dev via Docker)
 - **Cache**: Redis 6.2
 - **Storage**: AWS S3 (prod), Local (dev)
@@ -105,7 +105,7 @@ pythonie/
 
 ### Prerequisites
 
-- Python 3.12 (required)
+- Python 3.13 (required)
 - Docker + docker-compose
 - Task (or Make)
 - Git
@@ -163,8 +163,8 @@ task run
 ### Local Setup (without Docker)
 
 ```bash
-# 1. Create virtualenv (ensure Python 3.12)
-python3.12 -m venv pythonie-venv
+# 1. Create virtualenv (ensure Python 3.13)
+python3.13 -m venv pythonie-venv
 source pythonie-venv/bin/activate
 
 # 2. Install dependencies
@@ -1412,7 +1412,7 @@ http://localhost:8000/documents/          # Document downloads
 development.env               # Dev env template
 production.env                # Prod env template (gitignored)
 docker-compose.yml            # Docker services
-Dockerfile                    # Python 3.12 image
+Dockerfile                    # Python 3.13 image
 Taskfile.yaml                 # Task automation
 Procfile                      # Heroku processes
 requirements/                 # Dependency management
@@ -1443,4 +1443,4 @@ pythonie/pythonie/wsgi.py     # WSGI application
 **Last updated**: 2025
 **Django Version**: 5.2.8
 **Wagtail Version**: 7.2
-**Python Version**: 3.12
+**Python Version**: 3.13

Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.19.0
-FROM python:3.12 AS compile-stage
+FROM python:3.13 AS compile-stage
 RUN --mount=type=cache,target=/var/cache/apt \
     apt update && \
     apt install -y --no-install-recommends \

README.md

@@ -4,7 +4,7 @@ Website for Python Ireland (python.ie / pycon.ie) community, built with Django 5
 
 ## Prerequisites
 
-- Python 3.12 (see `.tool-versions`)
+- Python 3.13 (see `.tool-versions`)
 - Docker & Docker Compose (for containerized development - recommended)
 - [Task](https://taskfile.dev/) (optional but recommended)
 - Redis (only for local non-Docker development)
@@ -47,7 +47,7 @@ If you prefer to develop without Docker:
 
 1. Fork the repository into your own personal GitHub account
 2. Clone your fork: `git clone [email protected]:YourGitHubName/website.git`
-3. Ensure you are running Python 3.12: `python -V` should output `Python 3.12.x`
+3. Ensure you are running Python 3.13: `python -V` should output `Python 3.13.x`
 4. Create a virtualenv: `python3 -m venv pythonie-venv`
 5. Activate the virtualenv: `source pythonie-venv/bin/activate`
 6. Install dependencies: `pip install -r requirements.txt` (or `uv pip install -r requirements.txt`)

runtime.txt

@@ -1 +1 @@
-python-3.12.11
+python-3.13.9