diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ee6b77c..36e7e18 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.12'
           cache: pip
           cache-dependency-path: constraints.txt requirements-dev.txt
       - run: pip install -r requirements-dev.txt
diff --git a/Dockerfile b/Dockerfile
index ae31e9f..3140657 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9
+FROM python:3.12
 WORKDIR /usr/src/app
 
 RUN (echo "Package: *" && echo "Pin: origin deb.nodesource.com" && echo "Pin-Priority: 600") > /etc/apt/preferences.d/nodesource && \
diff --git a/README.md b/README.md
index cff5670..4599b4c 100644
--- a/README.md
+++ b/README.md
@@ -16,7 +16,7 @@ It consists of a high level guide outlining the steps, example guide that has mo
 
 ### High level guide
 
-1. Install Python >= 3.9.
+1. Install Python >= 3.11.
 2. Clone Kirppu.
 3. Create virtualenv.
 4. Install dependencies with pip and requirements-dev.txt
@@ -194,6 +194,7 @@ To compile frontend sources for use in browser, there is two choices, which can
     Copyright (c) 2021 Jyrki Launonen
     Copyright (c) 2022 Jyrki Launonen
     Copyright (c) 2023 Jyrki Launonen
+    Copyright (c) 2024 Jyrki Launonen
 
     Permission is hereby granted, free of charge, to any person obtaining a copy
     of this software and associated documentation files (the "Software"), to deal
diff --git a/pyproject.toml b/pyproject.toml
index 7639be9..9e2d970 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 name = "kirppu"
 description = "Second-hand sales POS and vendor signup for conventions"
 version = "0"
-requires-python = ">=3.10"
+requires-python = ">=3.11"
 
 dependencies = [
     "django-environ~=0.11.0",