diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index f1061b7..c6b7c2d 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -12,10 +12,8 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
         exclude:
-          - os: macos-latest
-            python-version: '3.9'
           - os: macos-latest
             python-version: '3.10'
     steps:
@@ -39,7 +37,7 @@ jobs:
           fetch-depth: 0
       - uses: actions/setup-python@v7
         with:
-          python-version: '3.13'
+          python-version: '3.14'
       - run: pip install build~=1.2
       - run: python -m build
       - uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/Dockerfile b/Dockerfile
index 8952800..148cde1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG PYTHON_VERSION="3.13"
+ARG PYTHON_VERSION="3.14"
 
 FROM python:${PYTHON_VERSION}
 
diff --git a/README.rst b/README.rst
index ae2fabd..f2124b8 100644
--- a/README.rst
+++ b/README.rst
@@ -40,7 +40,7 @@ or creating a CLI.
 Requirements
 ============
 
-Python version 3.9 or later.
+Python version 3.10 or later.
 
 Python libraries as specified in `<requirements.txt>`_.
 
@@ -86,9 +86,11 @@ Example ``setup.py``:
         author_email = '...'
         classifiers = [
             'Development Status :: 1 - Planning',
-            'Programming Language :: Python :: 3.9',
             'Programming Language :: Python :: 3.10',
             'Programming Language :: Python :: 3.11',
+            'Programming Language :: Python :: 3.12',
+            'Programming Language :: Python :: 3.13',
+            'Programming Language :: Python :: 3.14',
             'Programming Language :: Python :: 3 :: Only']
         keywords = []
 
diff --git a/setup.py b/setup.py
index 7d9216f..5efa4c0 100644
--- a/setup.py
+++ b/setup.py
@@ -49,11 +49,11 @@ class Package(boilerplates.setup.Package):
         'Operating System :: MacOS',
         'Operating System :: Microsoft :: Windows',
         'Operating System :: POSIX :: Linux',
-        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: 3.13',
+        'Programming Language :: Python :: 3.14',
         'Programming Language :: Python :: 3 :: Only',
         'Topic :: Software Development :: Version Control :: Git',
         'Topic :: System :: Archiving :: Packaging',