diff --git a/.github/workflows/boj-build.yml b/.github/workflows/boj-build.yml
index b59be5f..245845d 100644
--- a/.github/workflows/boj-build.yml
+++ b/.github/workflows/boj-build.yml
@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Trigger BoJ Server (Casket/ssg-mcp)
         run: |
diff --git a/.github/workflows/hypatia-scan.yml b/.github/workflows/hypatia-scan.yml
index 8847941..23adfcd 100644
--- a/.github/workflows/hypatia-scan.yml
+++ b/.github/workflows/hypatia-scan.yml
@@ -25,7 +25,7 @@ jobs:
           fetch-depth: 0  # Full history for better pattern analysis
 
       - name: Setup Elixir for Hypatia scanner
-        uses: erlef/setup-beam@9d5b75ddfda22fb979d2270283237aef8aa68d6b # v1.18.2
+        uses: erlef/setup-beam@ee09b1e59bb240681c382eb1f0abc6a04af72764 # v1.18.2
         with:
           elixir-version: '1.19.4'
           otp-version: '28.3'
diff --git a/.github/workflows/quality.yml b/.github/workflows/quality.yml
index aa601a9..c5db6e2 100644
--- a/.github/workflows/quality.yml
+++ b/.github/workflows/quality.yml
@@ -18,7 +18,7 @@ jobs:
           find . -type f -perm /111 -name "*.sh" | head -10 || true
       
       - name: Check for secrets
-        uses: trufflesecurity/trufflehog@6c05c4a00b91aa542267d8e32a8254774799d68d # v3.93.8
+        uses: trufflesecurity/trufflehog@6c64db94d5b2e09d7e0948fb6bd3166cc6fffbc7 # v3.94.0
         with:
           path: ./
           base: ${{ github.event.pull_request.base.sha || github.event.before }}
diff --git a/.github/workflows/secret-scanner.yml b/.github/workflows/secret-scanner.yml
index 7ee5c9e..32fb74d 100644
--- a/.github/workflows/secret-scanner.yml
+++ b/.github/workflows/secret-scanner.yml
@@ -18,7 +18,7 @@ jobs:
           fetch-depth: 0  # Full history for scanning
 
       - name: TruffleHog Secret Scan
-        uses: trufflesecurity/trufflehog@6c05c4a00b91aa542267d8e32a8254774799d68d # v3
+        uses: trufflesecurity/trufflehog@6c64db94d5b2e09d7e0948fb6bd3166cc6fffbc7 # v3
         with:
           extra_args: --only-verified --fail