diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 075a588..9b31449 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -19,6 +19,9 @@ on:
   schedule:
     - cron: '41 16 * * 3'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
     name: Analyze (${{ matrix.language }})
@@ -54,6 +57,11 @@ jobs:
         # If you are analyzing a compiled language, you can modify the 'build-mode' for that language to customize how
         # your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
     steps:
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+      with:
+        egress-policy: audit
+
     - name: Checkout repository
       uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
 
diff --git a/.github/workflows/deploy-docs.yml b/.github/workflows/deploy-docs.yml
index 9d29c4a..fac9c61 100644
--- a/.github/workflows/deploy-docs.yml
+++ b/.github/workflows/deploy-docs.yml
@@ -20,6 +20,11 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
@@ -44,5 +49,10 @@ jobs:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - id: deployment
         uses: actions/deploy-pages@cd2ce8fcbc39b97be8ca5fce6e763baed58fa128 # v5.0.0
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index 09b4927..a860a5e 100644
--- a/.github/workflows/release-please.yml
+++ b/.github/workflows/release-please.yml
@@ -2,6 +2,9 @@ name: Release
 on:
   push:
     branches: [main]
+permissions:
+  contents: read
+
 jobs:
   release-please:
     runs-on: ubuntu-latest
@@ -11,6 +14,11 @@ jobs:
     outputs:
       release_created: ${{ steps.release.outputs.release_created }}
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - uses: googleapis/release-please-action@45996ed1f6d02564a971a2fa1b5860e934307cf7 # v5
         id: release
         with:
@@ -27,6 +35,11 @@ jobs:
       contents: read
       attestations: write
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index d80a214..9e82937 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -11,12 +11,20 @@ on:
         required: false
         default: 'main'
         type: string
+permissions:
+  contents: read
+
 jobs:
   lint:
     name: Lint
     runs-on: ubuntu-latest
     timeout-minutes: 5
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
@@ -34,6 +42,11 @@ jobs:
       matrix:
         browser: [chromium, firefox, webkit]
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
       - uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
         with:
@@ -54,6 +67,11 @@ jobs:
       pull-requests: write
       actions: read
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+
       - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0