diff --git a/.github/workflows/ci-cd.yml b/.github/workflows/ci-cd.yml
index 071df15..9a889c4 100644
--- a/.github/workflows/ci-cd.yml
+++ b/.github/workflows/ci-cd.yml
@@ -23,10 +23,10 @@ jobs:
       docker: ${{ steps.filter.outputs.docker }}
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Check for Docker-related changes
-        uses: dorny/paths-filter@v3
+        uses: dorny/paths-filter@fbd0ab8f3e69293af611ebaee6363fc25e6d187d # v4.0.1
         id: filter
         with:
           filters: |
@@ -38,16 +38,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Lint Dockerfile with Hadolint
-        uses: hadolint/hadolint-action@v3.3.0
+        uses: hadolint/hadolint-action@2332a7b74a6de0dda2e2221d575162eba76ba5e5 # v3.3.0
         with:
           dockerfile: docker/Dockerfile
           failure-threshold: error
 
       - name: Lint shell scripts with ShellCheck
-        uses: ludeeus/action-shellcheck@2.0.0
+        uses: ludeeus/action-shellcheck@00cae500b08a931fb5698e11e79bfbd38e612a38 # 2.0.0
         with:
           scandir: '.'
           severity: error
@@ -58,12 +58,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
       - name: Run Gitleaks
-        uses: gitleaks/gitleaks-action@v2
+        uses: gitleaks/gitleaks-action@e0c47f4f8be36e29cdc102c57e68cb5cbf0e8d1e # v3.0.0
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
@@ -77,13 +77,13 @@ jobs:
       image: semgrep/semgrep:1.144.0
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Run Semgrep
         run: semgrep scan --config auto --sarif --output semgrep.sarif
 
       - name: Upload SARIF results
-        uses: github/codeql-action/upload-sarif@v4
+        uses: github/codeql-action/upload-sarif@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
         if: always()
         with:
           sarif_file: semgrep.sarif
@@ -97,13 +97,13 @@ jobs:
       security-events: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       # Note: QEMU not needed - we only scan amd64 (native on GitHub runners)
       # Vulnerabilities are architecture-agnostic, no need to scan both arches
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
 
       - name: Determine version
         id: version
@@ -117,7 +117,7 @@ jobs:
           echo "Version: $VERSION"
 
       - name: Build image for scanning (amd64 only)
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: docker
           platforms: linux/amd64
@@ -129,7 +129,7 @@ jobs:
             VERSION=${{ steps.version.outputs.version }}
 
       - name: Scan for vulnerabilities (console output)
-        uses: aquasecurity/trivy-action@0.35.0
+        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # 0.35.0
         with:
           image-ref: ${{ env.IMAGE_NAME }}:scan
           format: 'table'
@@ -139,7 +139,7 @@ jobs:
           scanners: 'vuln'
 
       - name: Scan for vulnerabilities (SARIF)
-        uses: aquasecurity/trivy-action@0.35.0
+        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # 0.35.0
         with:
           image-ref: ${{ env.IMAGE_NAME }}:scan
           format: 'sarif'
@@ -150,7 +150,7 @@ jobs:
           scanners: 'vuln'
 
       - name: Upload scan results to GitHub Security
-        uses: github/codeql-action/upload-sarif@v4
+        uses: github/codeql-action/upload-sarif@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
         if: always()
         with:
           sarif_file: 'trivy-results.sarif'
@@ -170,18 +170,18 @@ jobs:
       id-token: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+        uses: docker/setup-qemu-action@06116385d9baf250c9f4dcb4858b16962ea869c3 # v4.1.0
         with:
           platforms: linux/amd64,linux/arm64
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
 
       - name: Log in to Docker Hub
-        uses: docker/login-action@v3
+        uses: docker/login-action@650006c6eb7dba73a995cc03b0b2d7f5ca915bee # v4.2.0
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ secrets.DOCKERHUB_USERNAME }}
@@ -200,7 +200,7 @@ jobs:
 
       - name: Extract metadata
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@80c7e94dd9b9319bd5eb7a0e0fe9291e23a2a2e9 # v6.1.0
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
@@ -216,7 +216,7 @@ jobs:
 
       - name: Build and push Docker image
         id: build
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         with:
           context: docker
           platforms: linux/amd64,linux/arm64
@@ -230,7 +230,7 @@ jobs:
             VERSION=${{ steps.version.outputs.version }}
 
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3
+        uses: sigstore/cosign-installer@7e8b541eb2e61bf99390e1afd4be13a184e9ebc5 # v3.10.1
 
       - name: Sign image with Cosign
         timeout-minutes: 5
@@ -239,7 +239,7 @@ jobs:
 
       - name: Update Docker Hub description
         if: github.ref == 'refs/heads/main'
-        uses: peter-evans/dockerhub-description@v5
+        uses: peter-evans/dockerhub-description@1b9a80c056b620d92cedb9d9b5a223409c68ddfa # v5.0.0
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
@@ -257,10 +257,10 @@ jobs:
       id-token: write
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: Setup Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
           node-version: '22'
           registry-url: 'https://registry.npmjs.org'