diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index 13e271a..ff7b26c 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -18,7 +18,7 @@ jobs:
         python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v4