diff --git a/.travis.yml b/.travis.yml
index eb7c289..7ee46e1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,7 @@ python:
   - 3.6
   - 3.7
   - 3.8
+  - 3.9
   - pypy3
 script:
   - flake8 .
diff --git a/setup.py b/setup.py
index 6524cd8..6f47daf 100644
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,7 @@
         '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',
     ],
diff --git a/tox.ini b/tox.ini
index f975503..714f9b4 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py35, py36, py37, py38, pypy3
+envlist = py35, py36, py37, py38, py39, pypy3
 
 [testenv]
 deps = -r{toxinidir}/requirements.txt