diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 42873f3..fa27827 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -6,14 +6,22 @@ on:
       - main
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Test check
     runs-on: ubuntu-latest
     
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - name: Checkout code
-        uses: actions/checkout@v6
+        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       
       - name: Run tests and coverage
         run: |