diff --git a/.coveragerc b/.coveragerc
index d70e082..f63b772 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,5 +1,7 @@
 [run]
 source = persistent
+# New in 5.0; required for the GHA coveralls submission.
+relative_files = True
 omit =
      persistent/_ring_build.py
 
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
new file mode 100644
index 0000000..c1f308d
--- /dev/null
+++ b/.github/workflows/tests.yml
@@ -0,0 +1,437 @@
+###
+# Initially copied from
+# https://github.com/actions/starter-workflows/blob/main/ci/python-package.yml
+# And later based on the version I (jamadden) updated at
+# gevent/gevent, and then at zodb/relstorage and zodb/perfmetrics and zopefoundation/zope.interface
+#
+# Original comment follows.
+###
+###
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+###
+
+###
+# Important notes on GitHub actions:
+#
+# - We only get 2,000 free minutes a month (private repos)
+# - We only get 500MB of artifact storage
+# - Cache storage is limited to 7 days and 5GB.
+# - macOS minutes are 10x as expensive as Linux minutes
+# - windows minutes are twice as expensive.
+#
+# So keep those workflows light. Note: Currently, they seem to be free
+# and unlimited for open source projects. But for how long...
+#
+# In December 2020, github only supports x86/64. If we wanted to test
+# on other architectures, we can use docker emulation, but there's no
+# native support. It works, but is slow.
+#
+# Another major downside: You can't just re-run the job for one part
+# of the matrix. So if there's a transient test failure that hit, say, 3.8,
+# to get a clean run every version of Python runs again. That's bad.
+# https://github.community/t/ability-to-rerun-just-a-single-job-in-a-workflow/17234/65
+
+name: tests
+
+
+# Triggers the workflow on push or pull request events
+on: [push, pull_request]
+# Limiting to particular branches might be helpful to conserve minutes.
+#on:
+  # push:
+  #   branches: [ $default-branch ]
+  # pull_request:
+  #   branches: [ $default-branch ]
+
+env:
+  # Weirdly, this has to be a top-level key, not ``defaults.env``
+  PYTHONHASHSEED: 8675309
+  PYTHONUNBUFFERED: 1
+  PYTHONDONTWRITEBYTECODE: 1
+  PYTHONDEVMODE: 1
+  PYTHONFAULTHANDLER: 1
+  ZOPE_INTERFACE_STRICT_IRO: 1
+
+  PIP_UPGRADE_STRATEGY: eager
+  # Don't get warnings about Python 2 support being deprecated. We
+  # know. The env var works for pip 20.
+  PIP_NO_PYTHON_VERSION_WARNING: 1
+  PIP_NO_WARN_SCRIPT_LOCATION: 1
+
+  CFLAGS: -Ofast -pipe
+  CXXFLAGS: -Ofast -pipe
+  # Uploading built wheels for releases.
+  # TWINE_PASSWORD is encrypted and stored directly in the
+  # github repo settings.
+  TWINE_USERNAME: __token__
+
+  # We want to require the C extensions to build and function
+  # everywhere (except where we specifically opt-out, currently just
+  # PyPy, where they build but don't quite work).
+  PURE_PYTHON: 0
+
+  ###
+  # caching
+  # This is where we'd set up ccache, but this compiles so fast its not worth it.
+  ###
+
+
+
+jobs:
+  # Because sharing code/steps is so hard, and because it can be
+  # extremely valuable to be able to get binary wheels without
+  # uploading to PyPI and even if there is some failure, (e.g., for
+  # other people to test/debug), the strategy is to divide the process
+  # into several different jobs. The first builds and saves the binary
+  # wheels. It has dependent jobs that download and install the wheel
+  # to run tests, build docs, and perform linting. Building the
+  # manylinux wheels is an independent set of jobs.
+  #
+  # This division is time-saving for projects that take awhile to
+  # build, but somewhat less of a clear-cut win given how quick this
+  # is to compile (at least at this writing).
+  build-persistent:
+    # Sigh. Note that the matrix must be kept in sync
+    # with `test`, and `docs` must use a subset.
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        python-version: [2.7, pypy-2.7, pypy-3.6, 3.5, 3.6, 3.7, 3.8, 3.9]
+        os: [ubuntu-20.04, macos-latest]
+        exclude:
+          - os: macos-latest
+            python-version: pypy-2.7
+          - os: macos-latest
+            python-version: pypy-3.6
+          - os: macos-latest
+            python-version: 3.5
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      ###
+      # Caching.
+      # This actually *restores* a cache and schedules a cleanup action
+      # to save the cache. So it must come before the thing we want to use
+      # the cache.
+      ###
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: pip cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ runner.os }}-pip-${{ matrix.python-version }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
+      - name: Set CFLAGS
+        # GCC, optimizations, and -fno-wrapv can be an issue.
+        # Have one environment (not an uploaded wheel!)
+        # built that way.
+        # https://github.com/zopefoundation/persistent/issues/86
+        if: ${{ matrix.python-version == 3.6 && startsWith(runner.os, 'Linux') }}
+        run: |
+          echo CFLAGS="-O2 -fno-wrapv" >> $GITHUB_ENV
+      - name: Install Build Dependencies
+        run: |
+          pip install -U pip
+          pip install -U setuptools wheel twine cffi
+          pip install -U coveralls coverage
+
+      - name: Build persistent
+        run: |
+          # Next, build the wheel *in place*. This helps ccache, and also lets us cache the configure
+          # output (pip install uses a random temporary directory, making this difficult).
+          python setup.py build_ext -i
+          python setup.py bdist_wheel
+          # Also install it, so that we get dependencies in the (pip) cache.
+          pip install -U coverage
+          pip install -U 'faulthandler; python_version == "2.7" and platform_python_implementation == "CPython"'
+          pip install -U .[test]
+
+      - name: Check persistent build
+        run: |
+          ls -l dist
+          twine check dist/*
+      - name: Upload persistent wheel
+        uses: actions/upload-artifact@v2
+        with:
+          name: persistent-${{ runner.os }}-${{ matrix.python-version }}.whl
+          path: dist/*whl
+      - name: Publish package to PyPI (mac)
+        # We cannot 'uses: pypa/gh-action-pypi-publish@v1.4.1' because
+        # that's apparently a container action, and those don't run on
+        # the Mac.
+        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags') && startsWith(runner.os, 'Mac')
+        env:
+          TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
+        run: |
+          twine upload --skip-existing dist/*
+
+  test:
+    needs: build-persistent
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        python-version: [2.7, pypy-2.7, pypy-3.6, 3.5, 3.6, 3.7, 3.8, 3.9]
+        os: [ubuntu-20.04, macos-latest]
+        exclude:
+          - os: macos-latest
+            python-version: pypy-2.7
+          - os: macos-latest
+            python-version: pypy-3.6
+          - os: macos-latest
+            python-version: 3.5
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: pip cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ runner.os }}-pip-${{ matrix.python-version }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
+      - name: Download persistent wheel
+        uses: actions/download-artifact@v2
+        with:
+          name: persistent-${{ runner.os }}-${{ matrix.python-version }}.whl
+          path: dist/
+      - name: Install persistent
+        run: |
+          pip install -U wheel
+          pip install -U coverage
+          pip install -U 'faulthandler; python_version == "2.7" and platform_python_implementation == "CPython"'
+          pip install -U  "`ls dist/persistent*whl`[test]"
+          # Unzip into src/ so that testrunner can find the .so files
+          # when we ask it to load tests from that directory. This
+          # might also save some build time? (XXX: Sadly, persistent is not yet in
+          # src/)
+          unzip -n dist/persistent-*whl -d .
+      - name: Run tests with C extensions
+        if: ${{ !startsWith(matrix.python-version, 'pypy') }}
+        run: |
+          python -m coverage run -p -m zope.testrunner --test-path=. --auto-color --auto-progress
+      - name: Run tests without C extensions
+        run:
+          # coverage makes PyPy run about 3x slower, but the tests only take
+          # .4s to begin with (the whole process takes about 1.5), so that's
+          # still only 4.5s, which is maneagable.
+          PURE_PYTHON=1 python -m coverage run -p -m zope.testrunner --test-path=. --auto-color --auto-progress
+      - name: Report Coverage
+        run: |
+          coverage combine
+          coverage report -i
+      - name: Submit to Coveralls
+        # This is a container action, which only runs on Linux.
+        if: ${{ startsWith(runner.os, 'Linux') }}
+        uses: AndreMiras/coveralls-python-action@develop
+        with:
+          parallel: true
+
+  coveralls_finish:
+    needs: test
+    runs-on: ubuntu-20.04
+    steps:
+    - name: Coveralls Finished
+      uses: AndreMiras/coveralls-python-action@develop
+      with:
+        parallel-finished: true
+
+  docs:
+    needs: build-persistent
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        python-version: [3.9]
+        os: [ubuntu-20.04]
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: pip cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ runner.os }}-pip-${{ matrix.python-version }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
+      - name: Download persistent wheel
+        uses: actions/download-artifact@v2
+        with:
+          name: persistent-${{ runner.os }}-${{ matrix.python-version }}.whl
+          path: dist/
+      - name: Install persistent
+        run: |
+          pip install -U wheel
+          pip install -U coverage
+          pip install -U 'faulthandler; python_version == "2.7" and platform_python_implementation == "CPython"'
+          pip install -U  "`ls dist/persistent-*.whl`[docs]"
+      - name: Build docs
+        run: |
+          sphinx-build -b html -d docs/_build/doctrees docs docs/_build/html
+          sphinx-build -b doctest -d docs/_build/doctrees docs docs/_build/doctest
+
+
+  lint:
+    needs: build-persistent
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        python-version: [3.9]
+        os: [ubuntu-20.04]
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: pip cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ runner.os }}-pip-${{ matrix.python-version }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
+      - name: Download persistent wheel
+        uses: actions/download-artifact@v2
+        with:
+          name: persistent-${{ runner.os }}-${{ matrix.python-version }}.whl
+          path: dist/
+      - name: Install persistent
+        run: |
+          pip install -U pip
+          pip install -U wheel
+          pip install -U `ls dist/persistent-*`[test]
+      - name: Lint
+        # We only need to do this on one version, and it should be Python 3, because
+        # pylint has stopped updating for Python 2.
+        # TODO: Pick a linter and configuration and make this step right.
+        run: |
+          pip install -U pylint
+          # python -m pylint --limit-inference-results=1 --rcfile=.pylintrc persistent -f parseable -r n
+
+  manylinux:
+    runs-on: ubuntu-20.04
+    # We use a regular Python matrix entry to share as much code as possible.
+    strategy:
+      matrix:
+        python-version: [3.9]
+        image: [manylinux2010_x86_64, manylinux2010_i686, manylinux2014_aarch64]
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Get pip cache dir
+        id: pip-cache
+        run: |
+          echo "::set-output name=dir::$(pip cache dir)"
+
+      - name: pip cache
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.pip-cache.outputs.dir }}
+          key: ${{ runner.os }}-pip_manylinux-${{ matrix.image }}-${{ matrix.python-version }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+
+      - name: Update pip
+        run: pip install -U pip
+      - name: Build persistent (x86_64)
+        if: matrix.image == 'manylinux2010_x86_64'
+        # An alternate way to do this is to run the container directly with a uses:
+        # and then the script runs inside it. That may work better with caching.
+        # See https://github.com/pyca/bcrypt/blob/f6b5ee2eda76d077c531362ac65e16f045cf1f29/.github/workflows/wheel-builder.yml
+        # The 2010 image is the most recent spec that comes with Python 2.7,
+        # and only up through the tag 2021-02-06-3d322a5
+        env:
+          DOCKER_IMAGE: quay.io/pypa/${{ matrix.image }}:2021-02-06-3d322a5
+        run: |
+          bash .manylinux.sh
+      - name: Build persistent (i686)
+        if: matrix.image == 'manylinux2010_i686'
+        env:
+          DOCKER_IMAGE: quay.io/pypa/${{ matrix.image }}:2021-02-06-3d322a5
+          PRE_CMD: linux32
+        run: |
+          bash .manylinux.sh
+      - name: Build persistent (aarch64)
+        if: matrix.image == 'manylinux2014_aarch64'
+        env:
+          DOCKER_IMAGE: quay.io/pypa/${{ matrix.image }}
+        run: |
+          # First we must enable emulation
+          docker run --rm --privileged hypriot/qemu-register
+          bash .manylinux.sh
+
+      - name: Upload persistent wheels
+        uses: actions/upload-artifact@v2
+        with:
+          path: wheelhouse/*whl
+          name: manylinux_${{ matrix.image }}_wheels.zip
+      - name: Restore pip cache permissions
+        run: sudo chown -R $(whoami) ${{ steps.pip-cache.outputs.dir }}
+      - name: Publish package to PyPI
+        uses: pypa/gh-action-pypi-publish@v1.4.1
+        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+        with:
+          user: __token__
+          password: ${{ secrets.TWINE_PASSWORD }}
+          skip_existing: true
+          packages_dir: wheelhouse/
+
+# TODO:
+# * Use YAML syntax to share snippets, like the old .travis.yml did
+# Sadly, as of 2021-02-01, Github Actions does not support anchors at
+# all. Just having an anchor results in an error:
+#
+#   The workflow is not valid. .github/workflows/tests.yml: Anchors
+#   are not currently supported. Remove the anchor 'an-strategy'
+#
+# The alternative of using composite actions doesn't work either,
+# because composite actions are limited to running shell scripts.
+# Steps in them can't call other actions with `uses:`, and nor can
+# they be conditional with `if:`.
diff --git a/.manylinux-install.sh b/.manylinux-install.sh
index ebc9d3b..bb0e7a0 100755
--- a/.manylinux-install.sh
+++ b/.manylinux-install.sh
@@ -2,16 +2,42 @@
 
 set -e -x
 
+# Running inside docker
+# Set a cache directory for pip. This was
+# mounted to be the same as it is outside docker so it
+# can be persisted.
+export XDG_CACHE_HOME="/cache"
+# XXX: This works for macOS, where everything bind-mounted
+# is seen as owned by root in the container. But when the host is Linux
+# the actual UIDs come through to the container, triggering
+# pip to disable the cache when it detects that the owner doesn't match.
+# The below is an attempt to fix that, taken from bcrypt. It seems to work on
+# Github Actions.
+if [ -n "$GITHUB_ACTIONS" ]; then
+    echo Adjusting pip cache permissions
+    mkdir -p $XDG_CACHE_HOME/pip
+    chown -R $(whoami) $XDG_CACHE_HOME
+fi
+ls -ld /cache
+ls -ld /cache/pip
+
+# libffi-devel needed to build CFFI;
+# CFFI doesn't have wheels for aarch64
+yum -y install libffi-devel
+
 # Compile wheels
 for PYBIN in /opt/python/*/bin; do
     if [[ "${PYBIN}" == *"cp27"* ]] || \
        [[ "${PYBIN}" == *"cp35"* ]] || \
        [[ "${PYBIN}" == *"cp36"* ]] || \
        [[ "${PYBIN}" == *"cp37"* ]] || \
-       [[ "${PYBIN}" == *"cp38"* ]]; then
+       [[ "${PYBIN}" == *"cp38"* ]] || \
+       [[ "${PYBIN}" == *"cp39"* ]]; then
         "${PYBIN}/pip" install -U pip setuptools cffi
-        "${PYBIN}/pip" install -e /io/
+        "${PYBIN}/pip" install -e /io/[test]
+        "${PYBIN}/zope-testrunner" --test-path=/io/
         "${PYBIN}/pip" wheel /io/ -w wheelhouse/
+
         rm -rf /io/build /io/*.egg-info
     fi
 done
diff --git a/.manylinux.sh b/.manylinux.sh
index 2fed778..ccc5ed3 100755
--- a/.manylinux.sh
+++ b/.manylinux.sh
@@ -1,5 +1,13 @@
 #!/usr/bin/env bash
 
 set -e -x
+# Mount the current directory as /io
+# Mount the pip cache directory as /cache
+# `pip cache` requires pip 20.1
+echo Setting up caching
+python --version
+python -mpip --version
+LCACHE="$(dirname `python -mpip cache dir`)"
+echo Sharing pip cache at $LCACHE $(ls -ld $LCACHE)
 
-docker run --rm -v "$(pwd)":/io $DOCKER_IMAGE $PRE_CMD /io/.manylinux-install.sh
+docker run --rm -e GITHUB_ACTIONS -v "$(pwd)":/io -v "$LCACHE:/cache" $DOCKER_IMAGE $PRE_CMD /io/.manylinux-install.sh
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index dda3ec5..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,136 +0,0 @@
-language: python
-
-env:
-  global:
-    - TWINE_USERNAME: zope.wheelbuilder
-    # this sets $PYPIPASSWORD
-    - secure: "NTWzDr5p8KRPNt+sniTot7csbzC87rzir/XfLtENE0GpQ49FlKw3lBhsDqAPoD8Ea5lwiHXmC/C/ci1UZhFvVEkAoQ2qJlMRnhqUdRJSrqcitmRt0fT6mLaTd+Lr+DxKlBxpssobrEm2G42V/G1s0Ggym04OqF8T+s6MF5ywgJM="
-    # We want to require the C extensions to build and function
-    # everywhere (except where we specifically opt-out, currently just
-    # PyPy, where they build but don't quite work).
-    - PURE_PYTHON: 0
-
-
-python:
-  - 2.7
-  - 3.5
-  - 3.6
-  - 3.7
-  - 3.8
-  - 3.9
-
-jobs:
-  include:
-    # Don't test C extensions on PyPy.
-    - python: pypy
-      env: PURE_PYTHON=1
-
-    - python: pypy3
-      env: PURE_PYTHON=1
-
-    # Special Linux builds
-    - name: "Python: 2.7, pure (no C extensions)"
-      python: 2.7
-      env: PURE_PYTHON=1
-
-    # Test for https://github.com/zopefoundation/persistent/issues/86
-    - name: "Python: 3.6, -fno-wrapv"
-      python: 3.6
-      env: CFLAGS="-fno-wrapv"
-
-    - name: "Python: 3.7, pure (no C extensions)"
-      python: 3.7
-      env: PURE_PYTHON=1
-
-    - name: "Documentation"
-      python: 3.6
-      install:
-        - pip install -U -e .[docs]
-      script:
-        - sphinx-build -b html -d docs/_build/doctrees docs docs/_build/html
-        - sphinx-build -b doctest -d docs/_build/doctrees docs docs/_build/doctest
-      after_success:
-
-    # manylinux wheel builds
-    - name: 64-bit manylinux wheels (all Pythons)
-      services: docker
-      env: DOCKER_IMAGE=quay.io/pypa/manylinux2010_x86_64
-      install: docker pull $DOCKER_IMAGE
-      script: bash .manylinux.sh
-
-    - name: 32-bit manylinux wheels (all Pythons)
-      services: docker
-      env: DOCKER_IMAGE=quay.io/pypa/manylinux2010_i686 PRE_CMD=linux32
-      install: docker pull $DOCKER_IMAGE
-      script: bash .manylinux.sh
-
-    # It's important to use 'macpython' builds to get the least
-    # restrictive wheel tag. It's also important to avoid
-    # 'homebrew 3' because it floats instead of being a specific version.
-    - name: Python 2.7 wheels for MacOS
-      os: osx
-      language: generic
-      # We require at least 2.7.15 to upload wheels.
-      # See https://github.com/zopefoundation/BTrees/issues/113
-      env: TERRYFY_PYTHON='macpython 2.7.17'
-    - name: Python 3.5 wheels for MacOS
-      os: osx
-      language: generic
-      env: TERRYFY_PYTHON='macpython 3.5'
-    - name: Python 3.6 wheels for MacOS
-      os: osx
-      language: generic
-      # NB: 3.6.0 causes https://github.com/nedbat/coveragepy/issues/703
-      # NB: 3.6.1 had that ABI regression (fixed in 3.6.2) and would be a bad
-      # version to use
-      env: TERRYFY_PYTHON='macpython 3.6.2'
-    - name: Python 3.7 wheels for MacOS
-      os: osx
-      language: generic
-      env: TERRYFY_PYTHON='macpython 3.7.0'
-    - name: Python 3.8 wheels for MacOS
-      os: osx
-      language: generic
-      env: TERRYFY_PYTHON='macpython 3.8.0'
-
-before_install:
-  - |
-    if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
-      git clone https://github.com/MacPython/terryfy
-      source terryfy/travis_tools.sh
-      get_python_environment $TERRYFY_PYTHON venv
-    fi
-
-install:
-  - python -m pip install -U pip setuptools cffi wheel coverage coveralls
-  - python -m pip install -U -e .[test]
-
-script:
-  - python --version
-
-  # make sure we can build a wheel
-  - python setup.py bdist_wheel
-
-  # coverage makes PyPy run about 3x slower, but the tests only take
-  # .4s to begin with (the whole process takes about 1.5), so that's
-  # still only 4.5s, which is maneagable.
-  - python -m coverage run -m zope.testrunner --test-path=. --auto-color --auto-progress
-
-after_success:
-  - python -m coveralls
-  - |
-    if [[ $TRAVIS_TAG && "$TRAVIS_OS_NAME" == "osx" ]]; then
-      pip install twine
-      python setup.py bdist_wheel
-      TWINE_PASSWORD=$PYPIPASSWORD twine upload --skip-existing dist/*
-    fi
-  - |
-    if [[ $TRAVIS_TAG && -n "$DOCKER_IMAGE" ]]; then
-      pip install twine
-      TWINE_PASSWORD=$PYPIPASSWORD twine upload --skip-existing wheelhouse/*
-    fi
-
-notifications:
-  email: false
-
-cache: pip
diff --git a/CHANGES.rst b/CHANGES.rst
index a655855..124939a 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,14 +1,16 @@
-``persistent`` Changelog
-========================
+==========================
+ ``persistent`` Changelog
+==========================
 
-4.6.5 (unreleased)
-------------------
-
-- Nothing changed yet.
+4.7.0 (unreleased)
+==================
 
+- Add support for Python 3.9.
+- Move from Travis CI to Github Actions.
+- Supply manylinux wheels for aarch64 (ARM).
 
 4.6.4 (2020-03-26)
-------------------
+==================
 
 - Fix an overly specific test failure using zope.interface 5. See
   `issue 144 <https://github.com/zopefoundation/persistent/issues/144>`_.
@@ -16,7 +18,7 @@
   of obscure errors. See `issue 143 <https://github.com/zopefoundation/persistent/issues/143>`_.
 
 4.6.3 (2020-03-18)
-------------------
+==================
 
 - Fix a crash in the test suite under a 32-bit CPython on certain
   32-bit platforms. See `issue 137
@@ -25,7 +27,7 @@
 
 
 4.6.2 (2020-03-12)
-------------------
+==================
 
 - Fix an ``AssertionError`` clearing a non-empty ``PersistentMapping``
   that has no connection. See `issue 139
@@ -33,7 +35,7 @@
 
 
 4.6.1 (2020-03-06)
-------------------
+==================
 
 - Stop installing C header files on PyPy (which is what persistent before 4.6.0
   used to do), fixes `issue 135
@@ -41,7 +43,7 @@
 
 
 4.6.0 (2020-03-05)
-------------------
+==================
 
 - Fix slicing of ``PersistentList`` to always return instances of the
   same class. It was broken on Python 3 prior to 3.7.4.
@@ -87,7 +89,7 @@
   (except on PyPy).
 
 4.5.1 (2019-11-06)
-------------------
+==================
 
 - Add support for Python 3.8.
 
@@ -95,7 +97,7 @@
 
 
 4.5.0 (2019-05-09)
-------------------
+==================
 
 - Fully test the C implementation of the PickleCache, and fix
   discrepancies between it and the Python implementation:
@@ -127,7 +129,7 @@
 
 
 4.4.3 (2018-10-22)
-------------------
+==================
 
 - Fix the repr of the persistent objects to include the module name
   when using the C extension. This matches the pure-Python behaviour
@@ -141,7 +143,7 @@
 
 
 4.4.2 (2018-08-28)
-------------------
+==================
 
 - Explicitly use unsigned constants for packing and unpacking C
   timestamps, fixing an arithmetic issue for GCC when optimizations
@@ -150,14 +152,14 @@
 
 
 4.4.1 (2018-08-23)
-------------------
+==================
 
 - Fix installation of source packages on PyPy. See `issue 88
   <https://github.com/zopefoundation/persistent/issues/88>`_.
 
 
 4.4.0 (2018-08-22)
-------------------
+==================
 
 - Use unsigned constants when doing arithmetic on C timestamps,
   possibly avoiding some overflow issues with some compilers or
@@ -208,7 +210,7 @@
 
 
 4.3.0 (2018-07-30)
-------------------
+==================
 
 - Fix the possibility of a rare crash in the C extension when
   deallocating items. See https://github.com/zopefoundation/persistent/issues/66
@@ -224,19 +226,19 @@
 
 
 4.2.4.2 (2017-04-23)
---------------------
+====================
 
 - Packaging-only release: fix Python 2.7 ``manylinux`` wheels.
 
 
 4.2.4.1 (2017-04-21)
---------------------
+====================
 
 - Packaging-only release:  get ``manylinux`` wheel built automatically.
 
 
 4.2.4 (2017-03-20)
-------------------
+==================
 
 - Avoid raising a ``SystemError: error return without exception set``
   when loading an object with slots whose jar generates an exception
@@ -244,7 +246,7 @@
 
 
 4.2.3 (2017-03-08)
-------------------
+==================
 
 - Fix the hashcode of Python ``TimeStamp`` objects on 64-bit Python on
   Windows. See https://github.com/zopefoundation/persistent/pull/55
@@ -266,7 +268,7 @@
 
 
 4.2.2 (2016-11-29)
-------------------
+==================
 
 - Drop use of ``ctypes`` for determining maximum integer size, to increase
   pure-Python compatibility. See https://github.com/zopefoundation/persistent/pull/31
@@ -279,14 +281,14 @@
 
 
 4.2.1 (2016-05-26)
-------------------
+==================
 
 - Fix the hashcode of C ``TimeStamp`` objects on 64-bit Python 3 on
   Windows.
 
 
 4.2.0 (2016-05-05)
-------------------
+==================
 
 - Fixed the Python(/PYPY) implementation ``TimeStamp.timeTime`` method
   to have subsecond precision.
@@ -300,13 +302,13 @@
 
 
 4.1.1 (2015-06-02)
-------------------
+==================
 
 - Fix manifest and re-upload to fix stray files included in 4.1.0.
 
 
 4.1.0 (2015-05-19)
-------------------
+==================
 
 - Make the Python implementation of ``Persistent`` and ``PickleCache``
   behave more similarly to the C implementation. In particular, the
@@ -316,7 +318,7 @@
 
 
 4.0.9 (2015-04-08)
-------------------
+==================
 
 - Make the C and Python ``TimeStamp`` objects behave more alike. The
   Python version now produces the same ``repr`` and ``.raw()`` output as
@@ -332,7 +334,7 @@
 
 
 4.0.8 (2014-03-20)
-------------------
+==================
 
 - Add support for Python 3.4.
 
@@ -351,7 +353,7 @@
 
 
 4.0.7 (2014-02-20)
-------------------
+==================
 
 - Avoid a KeyError from ``_p_accessed()`` on newly-created objects under
   pure-Python:  these objects may be assigned to a jar, but not yet added
@@ -368,20 +370,20 @@
 
 
 4.0.6 (2013-01-03)
-------------------
+==================
 
 - Updated Trove classifiers.
 
 
 4.0.5 (2012-12-14)
-------------------
+==================
 
 - Fixed the C-extensions under Py3k (previously they compiled but were
   not importable).
 
 
 4.0.4 (2012-12-11)
-------------------
+==================
 
 - Added support for Python 3.3.
 
@@ -390,7 +392,7 @@
 
 
 4.0.3 (2012-11-19)
-------------------
+==================
 
 - Fixed: In the C implimentation, an integer was compared with a
   pointer, with undefined results and a compiler warning.
@@ -404,13 +406,13 @@
 
 
 4.0.2 (2012-08-27)
-------------------
+==================
 
 - Correct initialization functions in renamed ``_timestamp`` extension.
 
 
 4.0.1 (2012-08-26)
-------------------
+==================
 
 - Worked around test failure due to overflow to long on 32-bit systems.
 
@@ -426,10 +428,10 @@
 
 
 4.0.0 (2012-08-11)
-------------------
+==================
 
 Platform Changes
-################
+----------------
 
 - Added explicit support for Python 3.2 and PyPy.
 
@@ -439,7 +441,7 @@ Platform Changes
 - Dropped support for Python < 2.6.
 
 Testing Changes
-###############
+---------------
 
 - 100% unit test coverage.
 
@@ -464,7 +466,7 @@ Testing Changes
   run with ``setup.py test``.
 
 Documentation Changes
-#####################
+---------------------
 
 - Refactored many Doctests as Sphinx documentation (snippets are exercised
   via 'tox').
diff --git a/MANIFEST.in b/MANIFEST.in
index 47329ad..43b2718 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -7,6 +7,7 @@ include *.yml
 
 recursive-include docs *
 recursive-include persistent *
+recursive-include .github *.yml
 
 global-exclude *.dll
 global-exclude *.pyc
@@ -19,7 +20,6 @@ prune persistent/__pycache__
 
 
 include .coveragerc
-include .travis.yml
 include buildout.cfg
 include tox.ini
 include *.py
diff --git a/README.rst b/README.rst
index b9c6b56..c933987 100644
--- a/README.rst
+++ b/README.rst
@@ -1,8 +1,9 @@
-``persistent``:  automatic persistence for Python objects
-=========================================================
+===========================================================
+ ``persistent``:  automatic persistence for Python objects
+===========================================================
 
-.. image:: https://travis-ci.com/zopefoundation/persistent.svg?branch=master
-        :target: https://travis-ci.com/zopefoundation/persistent
+.. image:: https://github.com/zopefoundation/persistent/actions/workflows/tests.yml/badge.svg
+        :target: https://github.com/zopefoundation/persistent/actions/workflows/tests.yml
 
 .. image:: https://coveralls.io/repos/github/zopefoundation/persistent/badge.svg?branch=master
         :target: https://coveralls.io/github/zopefoundation/persistent?branch=master
diff --git a/appveyor.yml b/appveyor.yml
index c2fb848..a220af0 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -16,6 +16,8 @@ environment:
     - python: 37-x64
     - python: 38
     - python: 38-x64
+    - python: 39
+    - python: 39-x64
 
 install:
   - "SET PATH=C:\\Python%PYTHON%;c:\\Python%PYTHON%\\scripts;%PATH%"
diff --git a/setup.py b/setup.py
index d98193f..b972cc3 100644
--- a/setup.py
+++ b/setup.py
@@ -100,6 +100,7 @@ def _read_file(filename):
           "Programming Language :: Python :: 3.6",
           "Programming Language :: Python :: 3.7",
           "Programming Language :: Python :: 3.8",
+          "Programming Language :: Python :: 3.9",
           "Programming Language :: Python :: Implementation :: CPython",
           "Programming Language :: Python :: Implementation :: PyPy",
           "Framework :: ZODB",