diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 65a38ba..1c7af9e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,7 +63,7 @@ jobs:
       fail-fast: ${{ !contains(github.event.pull_request.labels.*.name, 'CI-no-fail-fast') }}
       matrix:
         python-version:
-          ["3.9", "3.10", "3.11", "3.12", "3.13", pypy-3.9, pypy-3.10]
+          ["3.9", "3.10", "3.11", "3.12", "3.13", "3.13t", pypy-3.9, pypy-3.10]
         platform:
           [
             {
@@ -114,7 +114,7 @@ jobs:
       - uses: actions/checkout@v4
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v5
+        uses: Quansight-Labs/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
           architecture: ${{ matrix.platform.python-architecture }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1de64c2..e5a5b52 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ## Unreleased
 ### Packaging
 - Drop support for Python 3.8. [#479](https://github.com/PyO3/setuptools-rust/pull/479)
+- Support free-threaded Python. [#502](https://github.com/PyO3/setuptools-rust/pull/502)
 
 ## 1.10.2 (2024-10-02)
 ### Fixed