diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 570d15c..2f5427e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -29,7 +29,7 @@ jobs:
       fail-fast: false
 
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14", "3.15"]
         qt-lib: [pyqt5, pyqt6, pyside6]
         os: [ubuntu-latest, windows-latest, macos-latest]
         include:
@@ -39,6 +39,11 @@ jobs:
           - python-version: "3.9"
             qt-lib: pyside60
             os: ubuntu-latest
+        exclude:
+          # No PySide6 release supports Python 3.15 yet (all declare
+          # Requires-Python <3.15), so it cannot be installed.
+          - python-version: "3.15"
+            qt-lib: pyside6
 
     steps:
     - uses: actions/checkout@v7
@@ -47,6 +52,7 @@ jobs:
       uses: actions/setup-python@v7.0.0
       with:
         python-version: ${{ matrix.python-version }}
+        allow-prereleases: true
 
     - name: Download Package
       uses: actions/download-artifact@v8
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 7bca4f2..b9cd0f6 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,3 +1,9 @@
+UNRELEASED
+----------
+
+- Added official support for Python 3.14.
+- Python 3.15 is now tested in CI.
+
 4.5.0 (2025-07-01)
 ------------------
 
diff --git a/pyproject.toml b/pyproject.toml
index d151311..e0bef18 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,7 @@ classifiers = [
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Topic :: Desktop Environment :: Window Managers",
     "Topic :: Software Development :: Quality Assurance",
     "Topic :: Software Development :: Testing",
diff --git a/tox.ini b/tox.ini
index 7a2e6a7..4d7bbdd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,6 @@
 [tox]
-envlist = py{39,310,311,312,313}-{pyqt5,pyside6,pyqt6},py39-pyside60,py39-pyqt61
+# No PySide6 release supports Python 3.15 yet, so py315 skips it.
+envlist = py{39,310,311,312,313,314}-{pyqt5,pyside6,pyqt6},py315-{pyqt5,pyqt6},py39-pyside60,py39-pyqt61
 
 [testenv]
 deps=