diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 82a807d..4de3619 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -21,7 +21,7 @@ jobs:
     - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v4
+      uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4
       with:
         enable-cache: true