diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 9987448f..0d7dd0e8 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -6,6 +6,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: read
+
 jobs:
   test:
     runs-on: ubuntu-latest
@@ -15,9 +18,11 @@ jobs:
         python: ["3.10", "3.12"]
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
       - name: Install uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@caf0cab7a618c569241d31dcd442f54681755d39 # v3.2.4
         with:
           enable-cache: true
       - name: Set up Python ${{ matrix.python }}
@@ -35,9 +40,11 @@ jobs:
   lint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
       - name: Install uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@caf0cab7a618c569241d31dcd442f54681755d39 # v3.2.4
         with:
           enable-cache: true
       - name: Set up Python
@@ -55,9 +62,11 @@ jobs:
   docs:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
       - name: Install uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@caf0cab7a618c569241d31dcd442f54681755d39 # v3.2.4
         with:
           enable-cache: true
       - name: Set up Python
@@ -69,7 +78,7 @@ jobs:
         run: |
           mkdir ./docs/build
           uv run ./docs/generate.sh --out=./docs/build/ --pypath=src/
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
         name: Upload Docs Preview
         with:
           name: reference-docs
@@ -78,9 +87,11 @@ jobs:
   format:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
       - name: Install uv
-        uses: astral-sh/setup-uv@v3
+        uses: astral-sh/setup-uv@caf0cab7a618c569241d31dcd442f54681755d39 # v3.2.4
         with:
           enable-cache: true
       - name: Set up Python
@@ -90,4 +101,4 @@ jobs:
           uv sync
       - name: Check Formatting with ruff
         run: |
-          uv run ruff format --check .
\ No newline at end of file
+          uv run ruff format --check .
diff --git a/.github/workflows/release.yaml b/.github/workflows/release.yaml
index ead40bf0..68e43a3c 100644
--- a/.github/workflows/release.yaml
+++ b/.github/workflows/release.yaml
@@ -20,6 +20,9 @@ on:
   # Allow workflow to be triggered manually.
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   stage_release:
     # To publish a release, merge the release PR with the label 'release:publish'.
@@ -34,15 +37,17 @@ jobs:
 
     steps:
     - name: Checkout source for staging
-      uses: actions/checkout@v3
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      with:
+        persist-credentials: false
 
     - name: Set up Python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@42375524e23c412d93fb67b49958b491fce71c38 # v5.4.0
       with:
         python-version: '3.10'
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v3
+      uses: astral-sh/setup-uv@caf0cab7a618c569241d31dcd442f54681755d39 # v3.2.4
       with:
         enable-cache: true
 
@@ -62,7 +67,7 @@ jobs:
     # Attach the packaged artifacts to the workflow output. These can be manually
     # downloaded for later inspection if necessary.
     - name: Archive artifacts
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0
       with:
         name: dist
         path: dist/
@@ -92,11 +97,13 @@ jobs:
 
     steps:
     - name: Checkout source for publish
-      uses: actions/checkout@v4
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      with:
+        persist-credentials: false
 
     # Download the artifacts created by the stage_release job.
     - name: Download release candidates
-      uses: actions/download-artifact@v4.1.7
+      uses: actions/download-artifact@fa0a91b85d4f404e444e00e005971372dc801d16 # v4.1.8
       with:
         name: dist
         path: dist
@@ -111,7 +118,7 @@ jobs:
     - name: Create release tag
       # Skip creating a release tag for prereleases
       if: (!contains(github.event.pull_request.labels.*.name, 'release:prerelease'))
-      uses: fleskesvor/create-release@1a72e235c178bf2ae6c51a8ae36febc24568c5fe
+      uses: fleskesvor/create-release@1a72e235c178bf2ae6c51a8ae36febc24568c5fe # zizmor: ignore[unpinned-uses]
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
@@ -122,4 +129,4 @@ jobs:
         prerelease: false
 
     - name: Publish to Pypi
-      uses: pypa/gh-action-pypi-publish@release/v1
+      uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # v1.14.2