diff --git a/.github/workflows/baseline_checks.yml b/.github/workflows/baseline_checks.yml
index 06fc0bc75..16eaf8b3d 100644
--- a/.github/workflows/baseline_checks.yml
+++ b/.github/workflows/baseline_checks.yml
@@ -7,13 +7,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: step-security/harden-runner@int-sh
+      - uses: step-security/harden-runner@668ad3cce4bd0191ec8fdd9868adcb7521a9dacd # int-sh
         with:
           egress-policy: audit
 
-      - uses: crazy-max/ghaction-github-status@v4
+      - uses: crazy-max/ghaction-github-status@6aadd1a8de5ca43c8e17a0633ef90e2178da5228 # v4.1.0
 
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
 
       - name: npm install
         run: |
@@ -22,12 +22,12 @@ jobs:
 
       - name: get-npm-version
         id: package-version
-        uses: martinbeentjes/npm-get-version-action@v1.3.1
+        uses: martinbeentjes/npm-get-version-action@3cf273023a0dda27efcd3164bdfb51908dd46a5b # v1.3.1
         with:
           path: src/exfiltration-demo
 
       - name: Publish to Registry
-        uses: elgohr/Publish-Docker-Github-Action@v5
+        uses: elgohr/Publish-Docker-Github-Action@eb53b3ec07136a6ebaed78d8135806da64f7c7e2 # v5
         with:
           name: ${{ github.repository }}/prod:latest
           username: ${{ github.actor }}
diff --git a/.github/workflows/changed-files-vulnerability-with-hr.yml b/.github/workflows/changed-files-vulnerability-with-hr.yml
index d8ed7379f..0f92ffd02 100644
--- a/.github/workflows/changed-files-vulnerability-with-hr.yml
+++ b/.github/workflows/changed-files-vulnerability-with-hr.yml
@@ -15,21 +15,21 @@ jobs:
     name: Test changed-files
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@v2
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
         with:
           disable-sudo: true
           egress-policy: block
           allowed-endpoints: >
             github.com:443
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
 
       # Example 1
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v40
+        uses: tj-actions/changed-files@af292f1e845a0377b596972698a8598734eb2796 # v40.0.0
 
       - name: List all changed files
         run: |
diff --git a/.github/workflows/changed-files-vulnerability-without-hr.yml b/.github/workflows/changed-files-vulnerability-without-hr.yml
index 4b74464f1..e9f8c3488 100644
--- a/.github/workflows/changed-files-vulnerability-without-hr.yml
+++ b/.github/workflows/changed-files-vulnerability-without-hr.yml
@@ -14,14 +14,19 @@ jobs:
     runs-on: ubuntu-latest
     name: Test changed-files
     steps:
-      - uses: actions/checkout@v4
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
 
       # Example 1
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v40
+        uses: tj-actions/changed-files@af292f1e845a0377b596972698a8598734eb2796 # v40.0.0
 
       - name: List all changed files
         run: |
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index f42852631..187746b30 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -6,16 +6,16 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: step-security/harden-runner@v2
+      - uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
         with:
           egress-policy: audit
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
       - name: npm install
         run: |
           cd ./src/exfiltration-demo
           npm install
       - name: Publish to Registry
-        uses: elgohr/Publish-Docker-Github-Action@v5
+        uses: elgohr/Publish-Docker-Github-Action@eb53b3ec07136a6ebaed78d8135806da64f7c7e2 # v5
         with:
           name: ${{ github.repository }}/prod:latest
           username: ${{ github.actor }}
diff --git a/.github/workflows/tj-actions-changed-files-incident.yaml b/.github/workflows/tj-actions-changed-files-incident.yaml
index 7426c56fb..0e1553d5f 100644
--- a/.github/workflows/tj-actions-changed-files-incident.yaml
+++ b/.github/workflows/tj-actions-changed-files-incident.yaml
@@ -14,19 +14,19 @@ jobs:
     name: Test changed-files
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@v2
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
         with:
           disable-sudo: true
           egress-policy: audit
 
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 0
 
       # Example 1
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v35
+        uses: tj-actions/changed-files@039afcd1024c210363c9d3fc8fd07e1f3fcf2867 # v35.9.3
 
       - name: List all changed files
         run: |
diff --git a/.github/workflows/toc-tou.yml b/.github/workflows/toc-tou.yml
index 50ca25cb9..1a8bd20ef 100644
--- a/.github/workflows/toc-tou.yml
+++ b/.github/workflows/toc-tou.yml
@@ -15,7 +15,12 @@ jobs:
       contents: read
       pull-requests: read
     steps:
-      - uses: actions/checkout@v4
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       
       - name: Wait for demo purposes
         run: |
@@ -40,7 +45,12 @@ jobs:
       contents: read
       pull-requests: read
     steps:
-      - uses: actions/checkout@v4
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       
       - name: Wait for demo purposes
         run: |
@@ -48,7 +58,7 @@ jobs:
           sleep 120
       
       # SECURE: Gets exactly the code that was approved
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           ref: ${{ github.event.pull_request.head.sha }}