diff --git a/.github/workflows/ci_decrypt-oracle.yaml b/.github/workflows/ci_decrypt-oracle.yaml
index 335bc8e98..baf01c571 100644
--- a/.github/workflows/ci_decrypt-oracle.yaml
+++ b/.github/workflows/ci_decrypt-oracle.yaml
@@ -11,7 +11,7 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           # The oracle will run on a Python 3.9 Lamba
@@ -38,7 +38,7 @@ jobs:
           - flake8-tests
           - pylint-tests
     steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
         - uses: actions/setup-python@v4
           with:
             python-version: 3.9
diff --git a/.github/workflows/ci_static-analysis.yaml b/.github/workflows/ci_static-analysis.yaml
index 0093ae9a9..7f74e8fc3 100644
--- a/.github/workflows/ci_static-analysis.yaml
+++ b/.github/workflows/ci_static-analysis.yaml
@@ -27,7 +27,7 @@ jobs:
           - black-check
           - isort-check
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: 3.8
diff --git a/.github/workflows/ci_test-vector-handler.yaml b/.github/workflows/ci_test-vector-handler.yaml
index 12ecf8f93..9c676de4e 100644
--- a/.github/workflows/ci_test-vector-handler.yaml
+++ b/.github/workflows/ci_test-vector-handler.yaml
@@ -42,7 +42,7 @@ jobs:
           aws-access-key-id: ${{ secrets.INTEG_AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.INTEG_AWS_SECRET_ACCESS_KEY }}
           aws-region: us-west-2
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
@@ -69,7 +69,7 @@ jobs:
           - flake8-tests
           - pylint-tests
     steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
         - uses: actions/setup-python@v4
           with:
             python-version: 3.9
diff --git a/.github/workflows/ci_tests.yaml b/.github/workflows/ci_tests.yaml
index 9d491203c..8ebbefd67 100644
--- a/.github/workflows/ci_tests.yaml
+++ b/.github/workflows/ci_tests.yaml
@@ -52,7 +52,7 @@ jobs:
           - os: macos-latest
             architecture: x86
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
@@ -73,7 +73,7 @@ jobs:
           - nocmk
           - test-upstream-requirements-py37
     steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
         - uses: actions/setup-python@v4
           with:
             python-version: 3.7
@@ -93,7 +93,7 @@ jobs:
           - nocmk
           - test-upstream-requirements-py311
     steps:
-        - uses: actions/checkout@v3
+        - uses: actions/checkout@v4
         - uses: actions/setup-python@v4
           with:
             python-version: "3.11"
diff --git a/.github/workflows/repo-sync.yml b/.github/workflows/repo-sync.yml
index 6b1c6be3e..e3776d399 100644
--- a/.github/workflows/repo-sync.yml
+++ b/.github/workflows/repo-sync.yml
@@ -9,7 +9,7 @@ jobs:
     environment: repo-sync
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: repo-sync/github-sync@v2
       name: Sync repo to branch
       with: