diff --git a/.github/workflows/claude-issue-triage.yml b/.github/workflows/claude-issue-triage.yml
index e0abbd97..36fd79ba 100644
--- a/.github/workflows/claude-issue-triage.yml
+++ b/.github/workflows/claude-issue-triage.yml
@@ -14,7 +14,7 @@ jobs:
       issues: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4
 
       - name: Run Claude Issue Triage
         uses: ./.github/actions/claude-issue-triage-action
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index bcd8ef59..7cccc9c4 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -25,7 +25,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4
         with:
           fetch-depth: 1