diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 5d74c8d..f4c8ec5 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/main.yaml b/.github/workflows/main.yaml
index 2edc85a..c3213a7 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 jobs:
   test:
     name: Test
@@ -14,6 +17,11 @@ jobs:
         go: ['oldstable', 'stable']
     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: Set up Golang
         uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
index 6771836..2f0831c 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
@@ -14,6 +17,11 @@ jobs:
       # the `vX.Y.Z` git tag. For a Go module that tag *is* the published
       # artifact (consumed directly by `go get`), so there is no separate
       # publish step like the npm packages in monetr/notify and monetr/vaul.
+      - 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: