diff --git a/.github/workflows/build-test.yml b/.github/workflows/build-test.yml
index 59f21c1c7..0a2296aff 100644
--- a/.github/workflows/build-test.yml
+++ b/.github/workflows/build-test.yml
@@ -116,7 +116,7 @@ jobs:
       CCACHE_DIR: ${{ github.workspace }}/.ccache
       CCACHE_LIMIT_MULTIPLE: 0.95
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           path: repo
       - name: Cache $CCACHE_DIR
diff --git a/.github/workflows/contributor.yml b/.github/workflows/contributor.yml
index cc3599695..a814be303 100644
--- a/.github/workflows/contributor.yml
+++ b/.github/workflows/contributor.yml
@@ -16,5 +16,5 @@ jobs:
     name: "'docs/CONTRIBUTORS' was signed"
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - run: test_regress/t/t_dist_contributors.py
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index c7a44975f..0f3e0b5b0 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -35,7 +35,7 @@ jobs:
     steps:
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: repo
 
diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index a039b6995..3ea8faf86 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -39,7 +39,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Extract context variables
         run: |
diff --git a/.github/workflows/format.yml b/.github/workflows/format.yml
index 74deea963..80f0b1b54 100644
--- a/.github/workflows/format.yml
+++ b/.github/workflows/format.yml
@@ -21,7 +21,7 @@ jobs:
       CI_COMMIT: ${{ github.sha }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
       - name: Install packages for build
diff --git a/.github/workflows/reusable-build.yml b/.github/workflows/reusable-build.yml
index ac890e786..93306e46a 100644
--- a/.github/workflows/reusable-build.yml
+++ b/.github/workflows/reusable-build.yml
@@ -48,7 +48,7 @@ jobs:
     steps:
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: repo
 
diff --git a/.github/workflows/reusable-lint-py.yml b/.github/workflows/reusable-lint-py.yml
index 83d505719..a991dc606 100644
--- a/.github/workflows/reusable-lint-py.yml
+++ b/.github/workflows/reusable-lint-py.yml
@@ -28,7 +28,7 @@ jobs:
     name: Sub-lint | Python
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: repo
 
diff --git a/.github/workflows/reusable-rtlmeter-build.yml b/.github/workflows/reusable-rtlmeter-build.yml
index 0ed682d32..432090f74 100644
--- a/.github/workflows/reusable-rtlmeter-build.yml
+++ b/.github/workflows/reusable-rtlmeter-build.yml
@@ -42,7 +42,7 @@ jobs:
           restore-keys: rtlmeter-build-ccache-${{ inputs.runs-on }}-${{ inputs.cc }}
 
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           path: repo
           fetch-depth: 0 # Required for 'git describe' used for 'verilator --version'
diff --git a/.github/workflows/reusable-rtlmeter-run.yml b/.github/workflows/reusable-rtlmeter-run.yml
index 63d3e9ccc..4bb8a7142 100644
--- a/.github/workflows/reusable-rtlmeter-run.yml
+++ b/.github/workflows/reusable-rtlmeter-run.yml
@@ -77,7 +77,7 @@ jobs:
           restore-keys: rtlmeter-run-ccache-${{ inputs.runs-on }}-${{ inputs.cc }}-${{ inputs.cases }}-${{ inputs.compileArgs }}
 
       - name: Checkout RTLMeter
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: "verilator/rtlmeter"
           path: rtlmeter
diff --git a/.github/workflows/rtlmeter.yml b/.github/workflows/rtlmeter.yml
index 699294ffa..e2cc60584 100644
--- a/.github/workflows/rtlmeter.yml
+++ b/.github/workflows/rtlmeter.yml
@@ -153,7 +153,7 @@ jobs:
         tag: [gcc, clang]
     steps:
       - name: Checkout RTLMeter
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: "verilator/rtlmeter"
           path: rtlmeter
@@ -211,7 +211,7 @@ jobs:
           repositories: verilator-rtlmeter-results
           permission-contents: write
       - name: Checkout verilator-rtlmeter-results
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: "verilator/verilator-rtlmeter-results"
           token: ${{ steps.generate-token.outputs.token }}
@@ -244,7 +244,7 @@ jobs:
       actions: read
     steps:
       - name: Checkout RTLMeter
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           repository: "verilator/rtlmeter"
           path: rtlmeter