diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2468ef2..2990d15 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,9 +14,14 @@ jobs:
     name: Lint & format
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.11"
 
diff --git a/.github/workflows/pr-guard.yml b/.github/workflows/pr-guard.yml
index b95a776..c7269ff 100644
--- a/.github/workflows/pr-guard.yml
+++ b/.github/workflows/pr-guard.yml
@@ -13,22 +13,32 @@ jobs:
     name: Lint commit messages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
-      - uses: wagoid/commitlint-github-action@v6
+      - uses: wagoid/commitlint-github-action@b948419dd99f3fd78a6548d48f94e3df7f6bf3ed # v6.2.1
 
   secrets:
     name: Scan for secrets
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
       - name: TruffleHog scan
-        uses: trufflesecurity/trufflehog@v3.94.3
+        uses: trufflesecurity/trufflehog@47e7b7cd74f578e1e3145d48f669f22fd1330ca6 # v3.94.3
         with:
           extra_args: --only-verified --fail
 
@@ -36,11 +46,16 @@ jobs:
     name: Validate YAML syntax
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
           fetch-depth: 0
 
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.11"
 
diff --git a/.github/workflows/validate-examples.yml b/.github/workflows/validate-examples.yml
index 9ff0b1b..054573d 100644
--- a/.github/workflows/validate-examples.yml
+++ b/.github/workflows/validate-examples.yml
@@ -20,9 +20,14 @@ jobs:
     name: Ansible — syntax & lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - uses: actions/setup-python@v6
+      - uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
           python-version: "3.11"
 
@@ -47,9 +52,14 @@ jobs:
     name: Terraform — fmt, validate & lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@a5ad31d6a139d249332a2605b85202e8c0b78450 # v2.19.1
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - uses: hashicorp/setup-terraform@v4
+      - uses: hashicorp/setup-terraform@5e8dbf3c6d9deaf4193ca7a8fb23f2ac83bb6c85 # v4.0.0
         with:
           terraform_version: "1.7"