diff --git a/.github/actions/set-metadata/action.yaml b/.github/actions/set-metadata/action.yaml
index 98e9b39..d30bc2b 100644
--- a/.github/actions/set-metadata/action.yaml
+++ b/.github/actions/set-metadata/action.yaml
@@ -119,7 +119,7 @@ runs:
   using: "composite"
   steps:
     - name: "Checkout code"
-      uses: actions/checkout@v6
+      uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
     - name: "Set default variables"
       shell: bash
diff --git a/.github/workflows/cicd-1-pull-request.yaml b/.github/workflows/cicd-1-pull-request.yaml
index 430d858..5f2f41f 100644
--- a/.github/workflows/cicd-1-pull-request.yaml
+++ b/.github/workflows/cicd-1-pull-request.yaml
@@ -38,7 +38,7 @@ jobs:
       image_tag: ${{ steps.set-metadata.outputs.image_tag }}
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: "Set CI/CD metadata"
         id: set-metadata
@@ -74,7 +74,7 @@ jobs:
   #     contents: read
   #   steps:
   #     - name: Checkout code
-  #       uses: actions/checkout@v6
+  #       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
   #     - name: Generate a token
   #       id: generate-token
diff --git a/.github/workflows/cicd-3-deploy.yaml b/.github/workflows/cicd-3-deploy.yaml
index 2745b38..b5835b1 100644
--- a/.github/workflows/cicd-3-deploy.yaml
+++ b/.github/workflows/cicd-3-deploy.yaml
@@ -24,7 +24,7 @@ jobs:
       tag: ${{ steps.variables.outputs.tag }}
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Set CI/CD variables"
         id: variables
         run: |
@@ -56,7 +56,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
   # TODO: More jobs or/and steps here
   # success:
   #   name: "Success notification"
diff --git a/.github/workflows/stage-1-coding-standards.yaml b/.github/workflows/stage-1-coding-standards.yaml
index 1ac377c..7e22e3c 100644
--- a/.github/workflows/stage-1-coding-standards.yaml
+++ b/.github/workflows/stage-1-coding-standards.yaml
@@ -39,7 +39,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to scan all commits
       - name: "Scan secrets"
@@ -51,7 +51,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to compare branches
       - name: "Check file format"
@@ -63,7 +63,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to compare branches
       - name: "Check Markdown format"
@@ -75,7 +75,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to compare branches
       - name: "Check English usage"
@@ -87,7 +87,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Lint Terraform"
         uses: ./.github/actions/lint-terraform
 
@@ -100,7 +100,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Count lines of code"
         uses: ./.github/actions/create-lines-of-code-report
         with:
@@ -120,7 +120,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v6
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Scan dependencies"
         uses: ./.github/actions/scan-dependencies
         with:
diff --git a/.github/workflows/stage-1-commit.yaml b/.github/workflows/stage-1-commit.yaml
index a516b78..323dc1d 100644
--- a/.github/workflows/stage-1-commit.yaml
+++ b/.github/workflows/stage-1-commit.yaml
@@ -39,7 +39,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to scan all commits
       - name: "Scan secrets"
@@ -50,7 +50,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to compare branches
       - name: "Check file format"
@@ -61,7 +61,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to compare branches
       - name: "Check Markdown format"
@@ -72,7 +72,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to compare branches
       - name: "Check English usage"
@@ -83,7 +83,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Lint Terraform"
         uses: ./.github/actions/lint-terraform
   count-lines-of-code:
@@ -95,7 +95,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Count lines of code"
         uses: ./.github/actions/create-lines-of-code-report
         with:
@@ -114,7 +114,7 @@ jobs:
     timeout-minutes: 2
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Scan dependencies"
         uses: ./.github/actions/scan-dependencies
         with:
diff --git a/.github/workflows/stage-2-test.yaml b/.github/workflows/stage-2-test.yaml
index efcb2ac..dd689f4 100644
--- a/.github/workflows/stage-2-test.yaml
+++ b/.github/workflows/stage-2-test.yaml
@@ -39,7 +39,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run unit test suite"
         run: |
           make test-unit
@@ -52,7 +52,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run linting"
         run: |
           make test-lint
@@ -66,7 +66,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run test coverage check"
         run: |
           make test-coverage
@@ -83,7 +83,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0 # Full history is needed to improving relevancy of reporting
       - name: "Perform static analysis"
diff --git a/.github/workflows/stage-3-build.yaml b/.github/workflows/stage-3-build.yaml
index 2a53a07..72f78e8 100644
--- a/.github/workflows/stage-3-build.yaml
+++ b/.github/workflows/stage-3-build.yaml
@@ -39,7 +39,7 @@ jobs:
     timeout-minutes: 3
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Build artefact 1"
         run: |
           echo "Building artefact 1 ..."
@@ -56,7 +56,7 @@ jobs:
     timeout-minutes: 3
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Build artefact 2"
         run: |
           echo "Building artefact 2 ..."
diff --git a/.github/workflows/stage-4-acceptance.yaml b/.github/workflows/stage-4-acceptance.yaml
index d554f98..7c7eb57 100644
--- a/.github/workflows/stage-4-acceptance.yaml
+++ b/.github/workflows/stage-4-acceptance.yaml
@@ -39,7 +39,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Create infractructure"
         run: |
           echo "Creating infractructure..."
@@ -56,7 +56,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run contract test"
         run: |
           make test-contract
@@ -70,7 +70,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run security test"
         run: |
           make test-security
@@ -84,7 +84,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run UI test"
         run: |
           make test-ui
@@ -98,7 +98,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run UI performance test"
         run: |
           make test-ui-performance
@@ -112,7 +112,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run integration test"
         run: |
           make test-integration
@@ -126,7 +126,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run accessibility test"
         run: |
           make test-accessibility
@@ -140,7 +140,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Run load tests"
         run: |
           make test-load
@@ -164,7 +164,7 @@ jobs:
     timeout-minutes: 5
     steps:
       - name: "Checkout code"
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - name: "Tear down environment"
         run: |
           echo "Tearing down environment..."