diff --git a/.github/workflows/pr-build-check.yml b/.github/workflows/pr-build-check.yml
index 795e5f9..9eb30dd 100644
--- a/.github/workflows/pr-build-check.yml
+++ b/.github/workflows/pr-build-check.yml
@@ -27,7 +27,7 @@ jobs:
             toolchain_dir: aarch64--musl--stable-2025.08-1
             cc: aarch64-buildroot-linux-musl-gcc
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Fetch toolchain
         run: |
           # Download to file (with retries) before extracting — piping
@@ -49,6 +49,6 @@ jobs:
     name: Test sensor extraction pipeline
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Run end-to-end pipeline smoke test
         run: tools/test_pipeline.sh
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 6068c21..4e9f1f9 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -27,7 +27,7 @@ jobs:
       branch_name: ${{ steps.vars.outputs.branch_name }}
       head_tag: ${{ steps.vars.outputs.head_tag }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
@@ -115,7 +115,7 @@ jobs:
       HEAD_TAG: ${{ needs.release.outputs.head_tag }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           fetch-depth: 0