diff --git a/.travis.yml b/.travis.yml
index aa8e812..b1c40ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,7 @@ python:
     - "3.6"
     - "3.7"
     - "3.8"
+    - "3.9"
     - "pypy3.5"
 install:
     - pip install .[flake8]
diff --git a/tox.ini b/tox.ini
index 6df7b72..c10d5ba 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py33,py34,py35,py36,py37,py38,pypy
+envlist = py27,py33,py34,py35,py36,py37,py38,py39,pypy
 
 [testenv]
 deps = -r{toxinidir}/test_requirements.txt