diff --git a/.github/workflows/bump-rekor.yml b/.github/workflows/bump-rekor.yml
index 90dfc8e..d1f8f8a 100644
--- a/.github/workflows/bump-rekor.yml
+++ b/.github/workflows/bump-rekor.yml
@@ -11,9 +11,11 @@ jobs:
       contents: write
       pull-requests: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          persist-credentials: false
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5
         with:
           python-version-file: pyproject.toml
           cache: "pip"
@@ -32,7 +34,7 @@ jobs:
           ./codegen/codegen.sh
 
       - name: create PR
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@5e914681df9dc83aa4e4905692ca88beb2f9e91f # v7
         with:
           commit-message: "[BOT] Regenerate for new Rekor version"
           branch: update-rekor
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index d134394..779a463 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -10,6 +10,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+        with:
+          persist-credentials: false
 
       - uses: actions/setup-python@0a5c61591373683505ea898e09a3ea4f39ef2b9c # v5.0.0
         with:
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index f484a39..dac8661 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -10,9 +10,11 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          persist-credentials: false
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5
         with:
           python-version-file: pyproject.toml
           cache: "pip"
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 352af6d..77ce9b7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -5,22 +5,23 @@ on:
 
 name: release
 
-permissions:
-  # Used for trusted publishing.
-  # Used to sign the release's artifacts with sigstore-python.
-  id-token: write
-
-  # Used to attach signing artifacts to the published release.
-  contents: write
-
 jobs:
   pypi:
     name: upload release to PyPI
     runs-on: ubuntu-latest
+    permissions:
+      # Used for trusted publishing.
+      # Used to sign the release's artifacts with sigstore-python.
+      id-token: write
+
+      # Used to attach signing artifacts to the published release.
+      contents: write
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      with:
+        persist-credentials: false
 
-    - uses: actions/setup-python@v5
+    - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5
       with:
         python-version-file: pyproject.toml
 
@@ -31,4 +32,4 @@ jobs:
       run: python -m build
 
     - name: publish
-      uses: pypa/gh-action-pypi-publish@v1.12.2
+      uses: pypa/gh-action-pypi-publish@15c56dba361d8335944d31a2ecd17d700fc7bcbc # v1.12.2
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d17ff90..fda18d3 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -14,11 +14,11 @@ jobs:
   smoketest-dists:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           persist-credentials: false
 
-      - uses: actions/setup-python@v5
+      - uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5
         with:
           python-version-file: pyproject.toml
 
diff --git a/.github/workflows/zizmor.yml b/.github/workflows/zizmor.yml
new file mode 100644
index 0000000..5a97d97
--- /dev/null
+++ b/.github/workflows/zizmor.yml
@@ -0,0 +1,36 @@
+name: GitHub Actions Security Analysis with zizmor 🌈
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  zizmor:
+    name: zizmor latest via Cargo
+    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@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        with:
+          persist-credentials: false
+      - name: Setup Rust
+        uses: actions-rust-lang/setup-rust-toolchain@11df97af8e8102fd60b60a77dfbf58d40cd843b8 # v1
+      - name: Get zizmor
+        run: cargo install zizmor
+      - name: Run zizmor 🌈
+        continue-on-error: true
+        run: zizmor --format sarif . > results.sarif
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Upload SARIF file
+        uses: github/codeql-action/upload-sarif@396bb3e45325a47dd9ef434068033c6d5bb0d11a # v3
+        with:
+          sarif_file: results.sarif
+          category: zizmor