diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
new file mode 100644
index 0000000..22a628e
--- /dev/null
+++ b/.github/workflows/actionlint.yml
@@ -0,0 +1,20 @@
+name: Lint GitHub Actions workflows
+
+on:
+  push:
+    paths:
+      - '.github/workflows/**'
+  pull_request:
+    paths:
+      - '.github/workflows/**'
+
+jobs:
+  actionlint:
+    name: Actionlint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v4
+
+      - name: Run actionlint
+        uses: reviewdog/action-actionlint@v1
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 5c69fc3..ba8bcdb 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -18,7 +18,7 @@ jobs:
 
       - name: Get PR labels
         id: get_labels
-        uses: actions/github-script@v6
+        uses: actions/github-script@v7
         with:
           script: |
             const prs = context.payload.workflow_run.pull_requests;
@@ -70,21 +70,21 @@ jobs:
           echo "PR Labels: ${{ needs.auto-merge.outputs.prLabels }}"
 
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
 
       - name: Install package
         run: |
           python -m pip install --upgrade pip setuptools wheel
-          pip install .[all]
+          pip install ".[all]"
 
       - name: Get version from package
         id: get_version
         run: |
-          VERSION=$(python -c "import pysdfgen; print(pysdfgen.__version__)")
+          VERSION="$(python -c "import pysdfgen; print(pysdfgen.__version__)")"
           echo "Detected version: $VERSION"
-          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
 
       - name: Tag and push release
         run: |
@@ -101,7 +101,7 @@ jobs:
           ref: main
           submodules: true
       - name: Set up Python
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
       - name: Install build tool
@@ -121,10 +121,11 @@ jobs:
     strategy:
       matrix:
         # https://github.com/actions/runner-images
-        # Note: To test macOS-x with Intel architecture,
-        # you need to use the paid macOS-x-large runner, as macOS-x is grouped with ARM-based runners.
-        # https://docs.github.com/en/actions/concepts/runners/about-larger-runners
-        os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, macos-13, macos-latest]
+        # Note: macos-13 is deprecated and will be retired by December 4, 2025
+        # Using macos-15-intel for Intel x86_64 architecture testing
+        # macos-latest (ARM-based Apple Silicon) for general testing
+        # https://github.blog/changelog/2025-09-19-github-actions-macos-13-runner-image-is-closing-down/
+        os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, macos-15-intel, macos-latest]
 
     steps:
       - uses: actions/checkout@v4
@@ -150,7 +151,7 @@ jobs:
     runs-on: ubuntu-latest
     environment: pypi
     steps:
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
       - uses: actions/download-artifact@v4
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c5cbf06..1cc8139 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,8 +15,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v4
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v5
       with:
         python-version: 3.8
     - name: Install Formatting
@@ -26,7 +26,7 @@ jobs:
     - name: Check Formatting
       run: |
         flake8 .
-        grep -rlIP '[^\x00-\x7F]' pysdfgen | grep '\.pyx\?' | sort > unicode.out; grep -rlI '# -\*- coding: \(utf-8\|latin-1\) -\*-' pysdfgen | grep '\.pyx\?' | sort > coding.out; comm -23 unicode.out coding.out > test_code.out; cat test_code.out;  test \! -s test_code.out
+        grep -rlIP '[^\x00-\x7F]' pysdfgen | grep '\\.pyx\\?' | sort > unicode.out; grep -rlI '# -\\*- coding: \\(utf-8\\|latin-1\\) -\\*-' pysdfgen | grep '\\.pyx\\?' | sort > coding.out; comm -23 unicode.out coding.out > test_code.out; cat test_code.out;  test ! -s test_code.out
     - name: Check isort
       run: |
         isort -c .
@@ -41,7 +41,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
     - name: Checkout submodules
@@ -65,10 +65,6 @@ jobs:
       image: python:2.7.18-buster
     steps:
     - uses: actions/checkout@v4
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
-      with:
-        python-version: ${{ matrix.python-version }}
     - name: Install APT On Linux
       run: |
         apt-get update -qq -y
@@ -93,10 +89,11 @@ jobs:
     strategy:
       matrix:
         # https://github.com/actions/runner-images
-        # Note: To test macOS-x with Intel architecture,
-        # you need to use the paid macOS-x-large runner, as macOS-x is grouped with ARM-based runners.
-        # https://docs.github.com/en/actions/concepts/runners/about-larger-runners
-        os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, macos-13, macos-latest]
+        # Note: macos-13 is deprecated and will be retired by December 4, 2025
+        # Using macos-15-intel for Intel x86_64 architecture testing
+        # macos-latest (ARM-based Apple Silicon) for general testing
+        # https://github.blog/changelog/2025-09-19-github-actions-macos-13-runner-image-is-closing-down/
+        os: [ubuntu-latest, ubuntu-24.04-arm, windows-latest, macos-15-intel, macos-latest]
 
     steps:
       - uses: actions/checkout@v4