diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 84a3e3d6..e8ff9207 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -13,7 +13,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v4
         with:
diff --git a/pyproject.toml b/pyproject.toml
index af9328f3..79ce0ba1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -3,7 +3,7 @@ requires = ["setuptools", "setuptools-scm", "setuptools-rust", "wheel"]
 
 [project]
 name = "libcst"
-description = "A concrete syntax tree with AST-like properties for Python 3.0 through 3.12 programs."
+description = "A concrete syntax tree with AST-like properties for Python 3.0 through 3.13 programs."
 readme = "README.rst"
 dynamic = ["version"]
 license = { file = "LICENSE" }
@@ -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",
 ]
 requires-python = ">=3.9"
 dependencies = ["pyyaml>=5.2"]