diff --git a/.github/workflows/boj-build.yml b/.github/workflows/boj-build.yml
index 144e367..c10b761 100644
--- a/.github/workflows/boj-build.yml
+++ b/.github/workflows/boj-build.yml
@@ -10,7 +10,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Trigger BoJ Server (Casket/ssg-mcp)
         run: |
           # Send a secure trigger to boj-server to build this repository
diff --git a/.github/workflows/casket-pages.yml b/.github/workflows/casket-pages.yml
index 44855bc..94ac7c8 100644
--- a/.github/workflows/casket-pages.yml
+++ b/.github/workflows/casket-pages.yml
@@ -17,9 +17,9 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v4
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v4
       - name: Checkout casket-ssg
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v4
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v4
         with:
           repository: hyperpolymath/casket-ssg
           path: .casket-ssg
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index d9306bb..de748c0 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -31,7 +31,7 @@ jobs:
             build-mode: none
     steps:
       - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Initialize CodeQL
         uses: github/codeql-action/init@8aad20d150bbac5944a9f9d289da16a4b0d87c1e # v3
         with:
diff --git a/.github/workflows/dogfood-gate.yml b/.github/workflows/dogfood-gate.yml
index f0a5baf..d6fa69e 100644
--- a/.github/workflows/dogfood-gate.yml
+++ b/.github/workflows/dogfood-gate.yml
@@ -22,7 +22,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Check for A2ML files
         id: detect
         run: |
@@ -62,7 +62,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Check for K9 files
         id: detect
         run: |
@@ -107,7 +107,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Scan for invisible characters
         id: lint
         run: |
@@ -168,7 +168,7 @@ jobs:
     timeout-minutes: 15
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Check for Groove manifest
         id: groove
         run: |
@@ -225,7 +225,7 @@ jobs:
     if: always()
     steps:
       - name: Checkout repository
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Generate dogfooding scorecard
         run: |
           SCORE=0
diff --git a/.github/workflows/elixir-ci.yml b/.github/workflows/elixir-ci.yml
index 45e64bf..2afcbe4 100644
--- a/.github/workflows/elixir-ci.yml
+++ b/.github/workflows/elixir-ci.yml
@@ -30,7 +30,7 @@ jobs:
         elixir: ['1.15', '1.16', '1.17']
         otp: ['26']
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Detect relevant changes
         id: detect
         working-directory: ${{ github.workspace }}
@@ -88,7 +88,7 @@ jobs:
       run:
         working-directory: elixir-mcp
     steps:
-      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+      - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
       - name: Detect relevant changes
         id: detect
         working-directory: ${{ github.workspace }}
diff --git a/.github/workflows/secret-scanner.yml b/.github/workflows/secret-scanner.yml
index 9fc8529..6dd3728 100644
--- a/.github/workflows/secret-scanner.yml
+++ b/.github/workflows/secret-scanner.yml
@@ -17,7 +17,7 @@ jobs:
   trufflehog:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0
       - name: TruffleHog Secret Scan