diff --git a/.github/workflows/ci-docker.yml b/.github/workflows/ci-docker.yml
index 831886e..7c130a5 100644
--- a/.github/workflows/ci-docker.yml
+++ b/.github/workflows/ci-docker.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v4.1.1
         with:
           fetch-depth: 0
       - uses: hadolint/hadolint-action@v3.1.0
diff --git a/.github/workflows/ci-python.yml b/.github/workflows/ci-python.yml
index 663f6ff..0c33e8c 100644
--- a/.github/workflows/ci-python.yml
+++ b/.github/workflows/ci-python.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v4.1.1
         with:
           fetch-depth: 0
       - name: Setup Python