diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 605f600..6bf6d3d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["pypy3.10", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        python-version: ["pypy3.10", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         os: [windows-latest, macos-latest, ubuntu-latest]
 
     steps:
@@ -35,7 +35,7 @@ jobs:
           tox -e py
 
       - name: Tox tests (pins)
-        if: matrix.python-version == '3.11' && matrix.os == 'ubuntu-latest'
+        if: matrix.python-version == '3.12' && matrix.os == 'ubuntu-latest'
         run: |
           tox -e pins
 
diff --git a/pyproject.toml b/pyproject.toml
index e1eafae..40a97c4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,6 +29,7 @@ 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 f3d0116..f534e0e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -5,7 +5,7 @@ env_list =
     cog
     lint
     pins
-    py{py3, 312, 311, 310, 39, 38}
+    py{py3, 313, 312, 311, 310, 39, 38}
 
 [testenv]
 extras =