diff --git a/.github/workflows/dev.yml b/.github/workflows/dev.yml
index 6bfa608..9e63138 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/dev.yml
@@ -27,7 +27,7 @@ jobs:
       VERSION: ${{ steps.version.outputs.VERSION }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           submodules: recursive
 
@@ -61,7 +61,7 @@ jobs:
       image_tag: ${{ steps.meta.outputs.image_tag }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
       - name: Compute image metadata
         id: meta
         run: |
diff --git a/.github/workflows/nightly.yaml b/.github/workflows/nightly.yaml
index 709994c..3cd17a8 100644
--- a/.github/workflows/nightly.yaml
+++ b/.github/workflows/nightly.yaml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
         with:
           submodules: recursive
   build:
@@ -40,7 +40,7 @@ jobs:
       image_tag: ${{ steps.meta.outputs.image_tag }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
       - name: Compute image tag
         id: meta
         run: |
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 92c5d4e..b4f0a09 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6
       - name: Install oras
         uses: oras-project/setup-oras@v1
         with: