diff --git a/.github/workflows/ci_decrypt-oracle.yaml b/.github/workflows/ci_decrypt-oracle.yaml
index 131beb1a7..78d201768 100644
--- a/.github/workflows/ci_decrypt-oracle.yaml
+++ b/.github/workflows/ci_decrypt-oracle.yaml
@@ -7,7 +7,7 @@ jobs:
   tests:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v4
         with:
           # The oracle will run on a Python 3.9 Lamba
@@ -34,7 +34,7 @@ jobs:
           - flake8-tests
           - pylint-tests
     steps:
-        - uses: actions/checkout@v4
+        - uses: actions/checkout@v5
         - 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 fe5f44b7c..7c56d49cb 100644
--- a/.github/workflows/ci_static-analysis.yaml
+++ b/.github/workflows/ci_static-analysis.yaml
@@ -23,7 +23,7 @@ jobs:
           - black-check
           - isort-check
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - 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 433f805f8..6957b6b0a 100644
--- a/.github/workflows/ci_test-vector-handler.yaml
+++ b/.github/workflows/ci_test-vector-handler.yaml
@@ -44,7 +44,7 @@ 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@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
@@ -71,7 +71,7 @@ jobs:
           - flake8-tests
           - pylint-tests
     steps:
-        - uses: actions/checkout@v4
+        - uses: actions/checkout@v5
         - 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 acb0b9b33..cb739a059 100644
--- a/.github/workflows/ci_tests.yaml
+++ b/.github/workflows/ci_tests.yaml
@@ -70,7 +70,7 @@ jobs:
         run: |
           git config --global core.longpaths true
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python }}
@@ -91,7 +91,7 @@ jobs:
           - nocmk
           - test-upstream-requirements-py311
     steps:
-        - uses: actions/checkout@v4
+        - uses: actions/checkout@v5
         - 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 e3776d399..b43c959e2 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@v4
+    - uses: actions/checkout@v5
     - uses: repo-sync/github-sync@v2
       name: Sync repo to branch
       with: