diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index c852936b6..a7ad601a4 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -21,6 +21,7 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          - {python: '3.13'}
           - {python: '3.12'}
           - {name: Windows, python: '3.12', os: windows-latest}
           - {name: Mac, python: '3.12', os: macos-latest}
diff --git a/tox.ini b/tox.ini
index 01e105f6b..74ab231c1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py3{12,11,10,9,8}
+    py3{13,12,11,10,9,8}
     pypy310
     style
     typing