diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 132faf3..ad049a9 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.10', '3.11', '3.12']
+        python-version: ['3.10', '3.11', '3.12', '3.13', 'pypy-3.10']
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
diff --git a/README.md b/README.md
index 94b56eb..c2e49f1 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,8 @@ pip install "asyncgui-ext-clock>=0.5,<0.6"
 - CPython 3.10
 - CPython 3.11
 - CPython 3.12
+- CPython 3.13
+- PyPy 3.10
 
 ## Misc
 
diff --git a/pyproject.toml b/pyproject.toml
index b2a2bb2..efd243c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ classifiers=[
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',
     'Programming Language :: Python :: 3.12',
+    'Programming Language :: Python :: 3.13',
     'Topic :: Software Development :: Libraries',
     'Operating System :: OS Independent',
 ]