diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 9362cb8..43ae3f2 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -19,7 +19,8 @@ jobs:
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
-        fetch-depth: 2
+        fetch-depth: 3
+        persist-credentials: false
 
     # If this run was triggered by a pull request event, then checkout
     # the head of the pull request instead of the merge commit.
diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index f838916..2ac2ec0 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -24,6 +24,8 @@ jobs:
 
       - name: Check out code into the Go module directory
         uses: actions/checkout@v4
+        with:
+          persist-credentials: false
 
       - name: Get dependencies
         run: go get -v -t -d ./...
diff --git a/.github/workflows/golangci-lint.yml b/.github/workflows/golangci-lint.yml
index 5e16d8c..933c1ae 100644
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -12,6 +12,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v6
         with:
diff --git a/.github/workflows/modver.yml b/.github/workflows/modver.yml
index 20a1049..2cee3f4 100644
--- a/.github/workflows/modver.yml
+++ b/.github/workflows/modver.yml
@@ -15,6 +15,7 @@ jobs:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
+          persist-credentials: false
       - uses: bobg/modver@v2.10.2
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 0000000..c09cf12
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,32 @@
+name: GitHub Actions Security Analysis with zizmor
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  zizmor:
+    name: zizmor latest via PyPI
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      # required for workflows in private repositories
+      contents: read
+      actions: read
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Install the latest version of uv
+        uses: astral-sh/setup-uv@v5
+        with:
+          enable-cache: false
+
+      - name: Run zizmor
+        run: uvx zizmor --format plain .
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}