diff --git a/.github/workflows/python-app.yml b/.github/workflows/python-app.yml
index 7b97b50..b9e935c 100644
--- a/.github/workflows/python-app.yml
+++ b/.github/workflows/python-app.yml
@@ -27,7 +27,7 @@ jobs:
           - 5432:5432
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
     - name: Install poetry
       run: pipx install poetry
     - uses: actions/setup-python@v4