diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e731ce8..2b65ac0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -330,9 +330,14 @@ jobs:
           - macos-13
           - windows-latest
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
+        with:
+          egress-policy: audit
+
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       -
         name: Set up Docker
         id: setup_docker