diff --git a/.github/workflows/build-darwin.yml b/.github/workflows/build-darwin.yml
index 7f31335..7e8d62c 100644
--- a/.github/workflows/build-darwin.yml
+++ b/.github/workflows/build-darwin.yml
@@ -12,6 +12,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - uses: actions/setup-python@v2
+        name: Install Python 3.9
+        with:
+          python-version: "3.9"
+
       - uses: actions/setup-python@v1
         name: Install Python 3.8
         with:
@@ -46,6 +51,10 @@ jobs:
         run: |
           pip install -r requirements-dev.txt
 
+      - name: Test for Python 3.9
+        run: |
+          tox -e py39
+
       - name: Test for Python 3.8
         run: |
           tox -e py38
diff --git a/.github/workflows/build-linux.yml b/.github/workflows/build-linux.yml
index 504d124..1430405 100644
--- a/.github/workflows/build-linux.yml
+++ b/.github/workflows/build-linux.yml
@@ -12,6 +12,11 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - uses: actions/setup-python@v2
+        name: Install Python 3.9
+        with:
+          python-version: "3.9"
+
       - uses: actions/setup-python@v1
         name: Install Python 3.8
         with:
@@ -46,6 +51,10 @@ jobs:
         run: |
           pip install -r requirements-dev.txt
 
+      - name: Test for Python 3.9
+        run: |
+          tox -e py39
+
       - name: Test for Python 3.8
         run: |
           tox -e py38
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index 7f523a0..61eab76 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -18,6 +18,12 @@ jobs:
     steps:
       - uses: actions/checkout@v2
 
+      - uses: actions/setup-python@v2
+        name: Install Python 3.9
+        with:
+          python-version: "3.9"
+          architecture: ${{ matrix.config.py-architecture }}
+
       - uses: actions/setup-python@v1
         name: Install Python 3.8
         with:
@@ -56,6 +62,12 @@ jobs:
         run: |
           pip install -r requirements-dev.txt
 
+      - name: Test for Python 3.9
+        shell: cmd
+        run: |
+          call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\Common7\Tools\VsDevCmd.bat" -no_logo -arch=${{ matrix.config.vs-arch }}
+          tox -e py39
+
       - name: Test for Python 3.8
         shell: cmd
         run: |
diff --git a/.travis.yml b/.travis.yml
index da33bc1..5d129c5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,12 +18,16 @@ matrix:
       sudo: true
     - python: 3.8
       env: TOXENV=py38
-      dist: xenial
-      sudo: true
-    - python: 'nightly'
       dist: bionic
       sudo: true
+    - python: 3.9
       env: TOXENV=py39
+      dist: focal
+      sudo: true
+    - python: 'nightly'
+      env: TOXENV=py310
+      dist: focal
+      sudo: true
   allow_failures:
     - python: nightly
 
diff --git a/CHANGES.rst b/CHANGES.rst
index 77a5ecc..d725b85 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,7 @@ CHANGES
 2.x.x
 -----
 
-
+- support Python 3.9
 
 2.1.6 (2020-03-17)
 ------------------
diff --git a/dockerfiles/buildwheel.sh b/dockerfiles/buildwheel.sh
index afc5646..dafa1d0 100755
--- a/dockerfiles/buildwheel.sh
+++ b/dockerfiles/buildwheel.sh
@@ -4,7 +4,7 @@ set -e -x
 ARCH=`uname -p`
 echo "arch=$ARCH"
 
-for V in cp38-cp38 cp37-cp37m cp36-cp36m cp35-cp35m; do
+for V in cp39-cp39 cp38-cp38 cp37-cp37m cp36-cp36m cp35-cp35m; do
     PYBIN=/opt/python/$V/bin
     rm -rf build src/cchardet/__pycache__ src/cchardet/*.cpp src/cchardet/*.pyc src/cchardet/*.so src/cchardet.egg-info src/tests/__pycache__ src/tests/*.pyc
     $PYBIN/pip install -r requirements-dev.txt
diff --git a/dockerfiles/develop/Dockerfile b/dockerfiles/develop/Dockerfile
index 7377ec3..d1c7074 100644
--- a/dockerfiles/develop/Dockerfile
+++ b/dockerfiles/develop/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8-buster
+FROM python:3.9-buster
 
 RUN pip install -U cython chardet nose
 
diff --git a/dockerfiles/slim/Dockerfile b/dockerfiles/slim/Dockerfile
index cdf1916..265e176 100644
--- a/dockerfiles/slim/Dockerfile
+++ b/dockerfiles/slim/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.8-slim-buster
+FROM python:3.9-slim-buster
 
 ENV BUILD_DEPS gcc g++
 
diff --git a/setup.py b/setup.py
index 2443b42..8b277d7 100644
--- a/setup.py
+++ b/setup.py
@@ -133,6 +133,7 @@ setup(
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
     keywords=[
         'cython',
diff --git a/tox.ini b/tox.ini
index 793e85a..de48ebc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py35, py36, py37, py38, py39
+envlist = py35, py36, py37, py38, py39, py310
 
 [testenv]
 commands =