diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 398a99f..040079c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@ jobs:
       cache-hit: ${{ steps.cache.outputs.cache-hit }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set up Python 3.13
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v5
@@ -52,7 +52,7 @@ jobs:
     needs: setup
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set up Python 3.13
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v5
@@ -84,7 +84,7 @@ jobs:
     needs: setup
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set up Python 3.13
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v5
@@ -116,7 +116,7 @@ jobs:
     needs: setup
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set up Python 3.13
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v5
@@ -148,7 +148,7 @@ jobs:
     needs: setup
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set up Python 3.13
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v5
@@ -184,7 +184,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set up Python 3.13
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v5
diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index 778484b..2ad780d 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6.0.0
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index b7e80dd..b0a0aa6 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -26,7 +26,7 @@ jobs:
       actions: read # Required for Claude to read CI results on PRs
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6.0.0
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index d44b476..194d9eb 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set up Python 3.13
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v5