diff --git a/.github/workflows/build-desktop.yml b/.github/workflows/build-desktop.yml
index 1861b1de..7fe2d5f9 100644
--- a/.github/workflows/build-desktop.yml
+++ b/.github/workflows/build-desktop.yml
@@ -38,7 +38,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 30
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - uses: ./.github/actions/setup
 
@@ -76,7 +76,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Check if tag already exists
         run: |
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e641ba72..3238b904 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/setup
       - run: bash scripts/check-tests.sh
 
@@ -33,7 +33,7 @@ jobs:
     # the same script runs via `pnpm docs:check`. Pre-build it once so the
     # JSON-LD parse check can read built HTML.
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/setup
       - name: Build the docs site
         run: pnpm --filter docs run build
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/setup
       - run: bash scripts/check-typecheck.sh
 
@@ -56,7 +56,7 @@ jobs:
     # version-sync's --pr mode is only meaningful in PR context
     if: github.event_name == 'pull_request'
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/setup
       - run: bash scripts/check-version-sync.sh
 
@@ -68,7 +68,7 @@ jobs:
       contents: read
       pull-requests: write
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/setup
       - name: Run Biome (advisory — never blocks merge)
         id: lint
@@ -129,7 +129,7 @@ jobs:
     timeout-minutes: 5
     if: github.event_name == 'pull_request'
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: ./.github/actions/setup
       - name: Run security audit
         run: pnpm audit --audit-level=high || true
diff --git a/.github/workflows/docker-publish.yml b/.github/workflows/docker-publish.yml
index 3138e3a3..aefb86d1 100644
--- a/.github/workflows/docker-publish.yml
+++ b/.github/workflows/docker-publish.yml
@@ -12,7 +12,7 @@ jobs:
       contents: read
     steps:
       - name: Checkout
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index d792e9d4..e1af066f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 20
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           # Full history so verify-version.js's git checks (G4, G5) see everything.
           fetch-depth: 0