diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8b9e419d..1eab18e9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,7 +22,7 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.3
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index dcfed7db..c4de4cf5 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -52,7 +52,7 @@ jobs:
         run: echo "Deploying to ${{ needs.determine_environment.outputs.env_name }}"
 
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.3
 
       - name: Debug OIDC claims
         run: |
diff --git a/.github/workflows/eval.yml b/.github/workflows/eval.yml
index 32a7b789..6af87042 100644
--- a/.github/workflows/eval.yml
+++ b/.github/workflows/eval.yml
@@ -52,7 +52,7 @@ jobs:
       matrix: ${{ steps.set-matrix.outputs.matrix }}
       runs: ${{ steps.set-runs.outputs.runs }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.3
       - name: Debug OIDC claims
         run: |
           echo "GitHub repository: ${{ github.repository }}"
@@ -188,7 +188,7 @@ jobs:
         run: ${{ fromJson(needs.build.outputs.runs) }}
       max-parallel: 10
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.3
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v6
         with:
diff --git a/.github/workflows/plan.yml b/.github/workflows/plan.yml
index f17737fd..93717ce8 100644
--- a/.github/workflows/plan.yml
+++ b/.github/workflows/plan.yml
@@ -27,7 +27,7 @@ jobs:
         run: echo "Tofu config directory ./terraform/config/${{ github.event.inputs.environment }}"
 
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.3
 
       - name: Configure AWS credentials
         uses: aws-actions/configure-aws-credentials@v6
diff --git a/.github/workflows/python_components.yml b/.github/workflows/python_components.yml
index 5e205757..7b8cc13d 100644
--- a/.github/workflows/python_components.yml
+++ b/.github/workflows/python_components.yml
@@ -14,7 +14,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@v6.0.3
       with:
         fetch-depth: 0
     - name: Set up Python 3.12