diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2f5cf8d..5a41ed7 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,9 +21,9 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, windows-latest, macos-latest]
-        pyv: ['3.9', '3.10', '3.11', '3.12']
+        pyv: ['3.9', '3.10', '3.11', '3.12', '3.13']
         include:
-          - {os: ubuntu-latest, pyv: 'pypy3.9'}
+          - {os: ubuntu-latest, pyv: 'pypy3.10'}
 
     steps:
       - name: Check out the repository
diff --git a/noxfile.py b/noxfile.py
index 18847a7..04bb092 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -16,7 +16,7 @@ def docs(session: nox.Session) -> None:
     session.run("mkdocs", "build")
 
 
-@nox.session(python=["3.9", "3.10", "3.11", "3.12", "pypy3.9"])
+@nox.session(python=["3.9", "3.10", "3.11", "3.12", "3.13", "pypy3.10"])
 def tests(session: nox.Session) -> None:
     session.install(".[tests]")
     session.run(
diff --git a/pyproject.toml b/pyproject.toml
index d0ea207..87095a2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,6 +14,7 @@ classifiers = [
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
   "Development Status :: 4 - Beta"
 ]
 requires-python = ">=3.9"