diff --git a/.manylinux-install.sh b/.manylinux-install.sh
index 150c2c0..89dafdf 100755
--- a/.manylinux-install.sh
+++ b/.manylinux-install.sh
@@ -9,7 +9,8 @@ for PYBIN in /opt/python/*/bin; do
        [[ "${PYBIN}" == *"cp35"* ]] || \
        [[ "${PYBIN}" == *"cp36"* ]] || \
        [[ "${PYBIN}" == *"cp37"* ]] || \
-       [[ "${PYBIN}" == *"cp38"* ]];
+       [[ "${PYBIN}" == *"cp38"* ]] || \
+       [[ "${PYBIN}" == *"cp39"* ]];
     then
         "${PYBIN}/pip" install tox
         "${PYBIN}/pip" install -U cython
@@ -31,7 +32,8 @@ for PYBIN in /opt/python/*/bin; do
        [[ "${PYBIN}" == *"cp35"* ]] || \
        [[ "${PYBIN}" == *"cp36"* ]] || \
        [[ "${PYBIN}" == *"cp37"* ]] || \
-       [[ "${PYBIN}" == *"cp38"* ]];
+       [[ "${PYBIN}" == *"cp38"* ]] || \
+       [[ "${PYBIN}" == *"cp39"* ]];
     then
         "${PYBIN}/pip" uninstall -y python-crfsuite
         "${PYBIN}/pip" install python-crfsuite --no-index -f /io/wheelhouse
diff --git a/.travis.yml b/.travis.yml
index 67270ac..f1de7ff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,9 @@
 language: python
 matrix:
   include:
+  - os: linux
+    python: 3.9
+    env: TOXENV=py39
   - os: linux
     python: 3.8
     env: TOXENV=py38
@@ -16,6 +19,11 @@ matrix:
   - os: linux
     python: 2.7
     env: TOXENV=py27
+  - os: osx
+    language: generic
+    env:
+      - PYTHON='3.9.0'
+      - TOXENV=py39
   - os: osx
     language: generic
     env:
diff --git a/appveyor.yml b/appveyor.yml
index 1fdbec5..b59c643 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,6 +14,8 @@ 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 0fa45f6..8d2a463 100755
--- a/setup.py
+++ b/setup.py
@@ -72,6 +72,7 @@ def c_compile(obj, src, ext, cc_args, extra_postargs, pp_opts):
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Software Development",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Topic :: Scientific/Engineering",