diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 146114e..ce9bb43 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -14,8 +14,8 @@ on:
 
 jobs:
   build:
-    name: Python ${{ matrix.python-version }}
-    runs-on: ubuntu-latest
+    name: Python ${{ matrix.python-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
 
     strategy:
       matrix:
@@ -26,7 +26,11 @@ jobs:
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
           - "pypy3.10"
+        os:
+          - ubuntu-latest
+          - windows-latest
 
     steps:
       - name: Git clone
@@ -36,15 +40,8 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "${{ matrix.python-version }}"
-
-      - name: Pip cache
-        uses: actions/cache@v4
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('setup.py') }}
-          restore-keys: |
-            ${{ runner.os }}-pip-${{ matrix.python-version }}-
-            ${{ runner.os }}-pip-
+          cache: pip
+          cache-dependency-path: setup.py
 
       - name: Install dependencies
         run: |
diff --git a/CHANGES.rst b/CHANGES.rst
index 4b2de77..c0bb598 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,9 @@ Changelog
 0.23.0 (unreleased)
 -------------------
 
+- Add support for Python 3.14: treat it as a released version, run CI tests on
+  3.14.
+
 - New option ``--allow-non-packages`` so you can automate tox.ini or GitHub
   workflow updates in projects that are not Python packages.
 
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index ccdc1d5..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-version: build-{build}-{branch}
-
-environment:
-  matrix:
-    # https://www.appveyor.com/docs/installed-software#python lists available
-    # versions
-    - PYTHON: "C:\\Python38"
-    - PYTHON: "C:\\Python39"
-    - PYTHON: "C:\\Python310"
-    - PYTHON: "C:\\Python311"
-    - PYTHON: "C:\\Python312"
-    - PYTHON: "C:\\Python313"
-
-init:
-  - "echo %PYTHON%"
-
-install:
-  - ps: |
-      if (-not (Test-Path $env:PYTHON)) {
-        curl -o install_python.ps1 https://raw.githubusercontent.com/matthew-brett/multibuild/11a389d78892cf90addac8f69433d5e22bfa422a/install_python.ps1
-        .\install_python.ps1
-      }
-  - ps: if (-not (Test-Path $env:PYTHON)) { throw "No $env:PYTHON" }
-  - "set PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
-  - python --version
-  - pip install -U virtualenv  # upgrade pip in tox's virtualenvs
-  - pip install setuptools  # the test suite needs the system python to have setuptools
-  - pip install tox
-
-build: off
-
-test_script:
-  - tox -e py
diff --git a/setup.py b/setup.py
index 029063e..a04dbdd 100755
--- a/setup.py
+++ b/setup.py
@@ -57,6 +57,7 @@
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
         'Programming Language :: Python :: 3.13',
+        'Programming Language :: Python :: 3.14',
         'Programming Language :: Python :: Implementation :: CPython',
         'Programming Language :: Python :: Implementation :: PyPy',
     ],
diff --git a/src/check_python_versions/versions.py b/src/check_python_versions/versions.py
index a5f2cf7..7fdebab 100644
--- a/src/check_python_versions/versions.py
+++ b/src/check_python_versions/versions.py
@@ -11,7 +11,7 @@
 
 MAX_PYTHON_1_VERSION = 6  # i.e. 1.6
 MAX_PYTHON_2_VERSION = 7  # i.e. 2.7
-CURRENT_PYTHON_3_VERSION = 13  # i.e. 3.13
+CURRENT_PYTHON_3_VERSION = 14  # i.e. 3.14
 
 MAX_MINOR_FOR_MAJOR = {
     1: MAX_PYTHON_1_VERSION,
diff --git a/tox.ini b/tox.ini
index 748e1d1..33d2366 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py38,py39,py310,py311,py312,py313,pypy3,flake8,mypy,isort,coverage
+envlist = py38,py39,py310,py311,py312,py313,py314,pypy3,flake8,mypy,isort,coverage
 
 [testenv]
 deps =