diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index da9ae18..556ef15 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
       matrix:
         # Only test supported Python versions:
         # https://endoflife.date/python
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy3.9"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "pypy3.9"]
 
     steps:
       - name: Checkout code
diff --git a/pyproject.toml b/pyproject.toml
index c10eaed..9dc8e51 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,6 +38,7 @@ classifiers = [
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: Implementation :: CPython",
     "Programming Language :: Python :: Implementation :: PyPy",
 ]
diff --git a/tox.ini b/tox.ini
index 5654ec1..7a56435 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,7 @@
 [tox]
 skipdist = true
 
-envlist = py{38,39,310,311,312,py39}-test
+envlist = py{39,310,311,312,313,py39}-test
 
 [pytest]
 norecursedirs = .eggs build tmp* vips-*