diff --git a/.github/workflows/actions.lock b/.github/workflows/actions.lock
new file mode 100644
index 0000000..f42344f
--- /dev/null
+++ b/.github/workflows/actions.lock
@@ -0,0 +1,31 @@
+# This file is machine-generated by `gh actions-lock`.
+# Do not edit by hand; run `gh actions-lock` to update.
+# Docs: https://gh.io/actions-lockfile
+version: 'v0.0.3'
+workflows:
+    '.github/workflows/ci.yml':
+        - 'actions/checkout@v7.0.1'
+        - 'actions/setup-python@v7.0.0'
+        - 'pex-tool/actions@main'
+        - 'pex-tool/pyenv-action@main'
+dependencies:
+    'actions/checkout@v7.0.1':
+        ref: 'v7.0.1'
+        commit: 'sha1-3d3c42e5aac5ba805825da76410c181273ba90b1'
+        owner_id: 44036562
+        repo_id: 197814629
+    'actions/setup-python@v7.0.0':
+        ref: 'v7.0.0'
+        commit: 'sha1-5fda3b95a4ea91299a34e894583c3862153e4b97'
+        owner_id: 44036562
+        repo_id: 192625525
+    'pex-tool/actions@main':
+        ref: 'main'
+        commit: 'sha1-e22fe0e0fe85e1f7eb5bbfc7674c7cbbf24ae6b5'
+        owner_id: 159246247
+        repo_id: 891735357
+    'pex-tool/pyenv-action@main':
+        ref: 'main'
+        commit: 'sha1-dcccfcc2bb18b008eca1ee92bbb05425e7126ead'
+        owner_id: 159246247
+        repo_id: 759510979
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 30b7dae..bf5d950 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,74 +18,111 @@ jobs:
     steps:
       - name: Noop
         run: "true"
-  tests-36-38:
+  tests-36-38-and-316:
     name: (${{ matrix.os }}) Python ${{ matrix.python-version[0] }}.${{ matrix.python-version[1] }} Tests
     needs: org-check
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-24.04, macos-13]
-        python-version: [[3, 6, 15], [3, 7, 17], [3, 8, 18]]
+        os: [ubuntu-24.04, macos-15]
+        python-version: [[3, 6, 15], [3, 7, 17], [3, 8, 18], [3, 16, "0a1"]]
     steps:
       - name: Checkout p537
-        uses: actions/checkout@v5
-      - name: "Setup Python ${{ join(matrix.python-version, '.') }}"
-        # Upgrade node16 -> node20: Out for review here:
-        #   https://github.com/gabrielfalcao/pyenv-action/pull/444
-        uses: pex-tool/pyenv-action@baec18679698d2f80064cc04eb9ad0c8dc5ca8f8
-        env:
-          ENSUREPIP: no
+        uses: actions/checkout@v7.0.1
+      - name: Install Python Build Deps
+        if: matrix.os == 'ubuntu-24.04'
+        run: |
+          sudo apt update
+          DEBIAN_FRONTEND=noninteractive sudo apt install -y \
+            build-essential \
+            curl \
+            git \
+            libbz2-dev \
+            libffi-dev \
+            liblzma-dev \
+            libncursesw5-dev \
+            libreadline-dev \
+            libsqlite3-dev \
+            libssl-dev \
+            libxml2-dev \
+            libxmlsec1-dev \
+            libzstd-dev \
+            make \
+            tk-dev \
+            xz-utils \
+            zlib1g-dev
+      - name: Install Pyenv
+        run: |
+          cd "${RUNNER_TOOL_CACHE}"
+          git clone https://github.com/pyenv/pyenv
+          (
+            cd pyenv
+            src/configure
+            make -C src
+          )
+          export PYENV_ROOT="$PWD/pyenv"
+          echo "PYENV_ROOT=${PYENV_ROOT}" >> "${GITHUB_ENV}"
+          echo "${PYENV_ROOT}/bin" >> "${GITHUB_PATH}"
+      - name: Setup Python ${{ join(matrix.python-version, '.') }}
+        run: |
+          pyenv install ${{ join(matrix.python-version, '.') }}
+          echo "${PYENV_ROOT}/versions/${{ join(matrix.python-version, '.') }}/bin" >> "${GITHUB_PATH}"
+      - name: Setup Tox Python
+        uses: actions/setup-python@v7.0.0
         with:
-          default: "${{ join(matrix.python-version, '.') }}"
-          command: pip install -U tox
+          python-version: 3.11
       - name: Run Unit Tests
-        run: tox -e py${{ matrix.python-version[0] }}${{ matrix.python-version[1] }}
+        run: |
+          python3.11 -V
+          python3.11 -mpip install -U pip
+          python3.11 -mpip install -U tox
+          python3.11 -mtox -e py${{ matrix.python-version[0] }}${{ matrix.python-version[1] }} -- -vvs
   tests-39-315:
     name: (${{ matrix.os }}) Python 3.9 - 3.15 Tests
     needs: org-check
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-24.04, macos-13, windows-2025]
+        os: [ubuntu-24.04, macos-15, windows-2025]
     steps:
       - name: Checkout p537
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7.0.1
       - name: Setup Python 3.9
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
           python-version: "3.9"
       - name: Setup Python 3.10
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
           python-version: "3.10"
       - name: Setup Python 3.11
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
           python-version: "3.11"
       - name: Setup Python 3.12
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
           python-version: "3.12"
       - name: Setup Python 3.13
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
           python-version: "3.13"
       - name: Setup Python 3.14
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
           python-version: "3.14"
       - name: Setup Python 3.15
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
-          python-version: "3.15.0-alpha.1"
+          python-version: "3.15"
       - name: Run Unit Tests
-        uses: pex-tool/actions/run-tox@7d8530c74d2e3ca4640d1ed9192b6e2b8c4f5f7b
+        uses: pex-tool/actions/run-tox@main
         with:
           tox-env: py39,py310,py311,py312,py313,py314,py315
   final-status:
     name: Gather Final Status
     needs:
-      - tests-36-38
+      - tests-36-38-and-316
       - tests-39-315
     runs-on: ubuntu-24.04
     steps:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 36ef0d2..c79268e 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -39,30 +39,67 @@ jobs:
             echo "::error::Release tag '${RELEASE_TAG}' must match 'v\d+.\d+.\d+'."
             exit 1
           fi
-  package-36-38-dists:
+  package-36-38-and-316-dists:
     name: ${{ matrix.os }} Package for Python ${{ matrix.python-version[0] }}.${{ matrix.python-version[1] }}
     needs: determine-tag
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-24.04, macos-13]
-        python-version: [[3, 6, 15], [3, 7, 17], [3, 8, 18]]
+        os: [ubuntu-24.04, macos-15]
+        python-version: [[3, 6, 15], [3, 7, 17], [3, 8, 18], [3, 16, "0a1"]]
     steps:
       - name: Checkout p537 ${{ needs.determine-tag.outputs.release-tag }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7.0.1
         with:
           ref: ${{ needs.determine-tag.outputs.release-tag }}
-      - name: "Setup Python ${{ join(matrix.python-version, '.') }}"
-        # Upgrade node16 -> node20: Out for review here:
-        #   https://github.com/gabrielfalcao/pyenv-action/pull/444
-        uses: pex-tool/pyenv-action@baec18679698d2f80064cc04eb9ad0c8dc5ca8f8
-        env:
-          ENSUREPIP: no
+      - name: Install Python Build Deps
+        if: matrix.os == 'ubuntu-24.04'
+        run: |
+          sudo apt update
+          DEBIAN_FRONTEND=noninteractive sudo apt install -y \
+            build-essential \
+            curl \
+            git \
+            libbz2-dev \
+            libffi-dev \
+            liblzma-dev \
+            libncursesw5-dev \
+            libreadline-dev \
+            libsqlite3-dev \
+            libssl-dev \
+            libxml2-dev \
+            libxmlsec1-dev \
+            libzstd-dev \
+            make \
+            tk-dev \
+            xz-utils \
+            zlib1g-dev
+      - name: Install Pyenv
+        run: |
+          cd "${RUNNER_TOOL_CACHE}"
+          git clone https://github.com/pyenv/pyenv
+          (
+            cd pyenv
+            src/configure
+            make -C src
+          )
+          export PYENV_ROOT="$PWD/pyenv"
+          echo "PYENV_ROOT=${PYENV_ROOT}" >> "${GITHUB_ENV}"
+          echo "${PYENV_ROOT}/bin" >> "${GITHUB_PATH}"
+      - name: Setup Python ${{ join(matrix.python-version, '.') }}
+        run: |
+          pyenv install ${{ join(matrix.python-version, '.') }}
+          echo "${PYENV_ROOT}/versions/${{ join(matrix.python-version, '.') }}/bin" >> "${GITHUB_PATH}"
+      - name: Setup Tox Python
+        uses: actions/setup-python@v7.0.0
         with:
-          default: "${{ join(matrix.python-version, '.') }}"
-          command: pip install -U tox
+          python-version: 3.11
       - name: Package ${{ needs.determine-tag.outputs.release-tag }}
-        run: tox -e package
+        run: |
+          python3.11 -V
+          python3.11 -mpip install -U pip
+          python3.11 -mpip install -U tox
+          python3.11 -mtox -e package
       - name: Upload Artifact
         uses: actions/upload-artifact@v4
         with:
@@ -75,15 +112,15 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-24.04, macos-13, windows-2025]
-        python-version: [[3, 9], [3, 10], [3, 11], [3, 12], [3, 13], [3, 14], [3, 15, "0-alpha.1"]]
+        os: [ubuntu-24.04, macos-15, windows-2025]
+        python-version: [[3, 9], [3, 10], [3, 11], [3, 12], [3, 13], [3, 14], [3, 15]]
     steps:
       - name: Checkout p537 ${{ needs.determine-tag.outputs.release-tag }}
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7.0.1
         with:
           ref: ${{ needs.determine-tag.outputs.release-tag }}
       - name: Setup Python ${{ join(matrix.python-version, '.') }}
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7.0.0
         with:
           python-version: "${{ join(matrix.python-version, '.') }}"
       - name: Package ${{ needs.determine-tag.outputs.release-tag }}
@@ -100,7 +137,7 @@ jobs:
     name: Publish sdist and wheel to PyPI
     needs:
       - determine-tag
-      - package-36-38-dists
+      - package-36-38-and-316-dists
       - package-39-315-dists
     runs-on: ubuntu-24.04
     environment: Release
diff --git a/setup.py b/setup.py
index 0186c86..5c72977 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@ def long_description():
 
 setup(
   name='p537',
-  version='1.0.10',
+  version='1.0.11',
   author="John Sirois",
   author_email="john.sirois@gmail.com",
   description='A tiny platform-specific distribution with a console script.',
@@ -33,8 +33,9 @@ def long_description():
     'Programming Language :: Python :: 3.14',
     'Programming Language :: Python :: 3.14',
     'Programming Language :: Python :: 3.15',
+    'Programming Language :: Python :: 3.16',
   ],
-  python_requires=">=3.6,<3.16",
+  python_requires=">=3.6,<3.17",
   ext_modules=[
     Extension('p537', sources=['p537module.c']),
   ],
diff --git a/tox.ini b/tox.ini
index c705cbf..a9f6afe 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,7 +1,8 @@
 [tox]
 minversion = 3.26.0
 isolated_build = true
-skip_missing_interpreters = True
+skip_missing_interpreters = true
+
 envlist =
     py36
     py37
@@ -13,10 +14,17 @@ envlist =
     py313
     py314
     py315
+    py316
 
 [testenv]
+# We need newer Pip to operate under Python 3.14.
+download = true
+
 deps =
-    pytest
+    pytest==6.2.5; python_version == "3.6"
+    pytest==7.4.4; python_version == "3.7"
+    pytest==8.3.3; python_version >= "3.8"
+
 commands = pytest -vs
 
 [testenv:package]