diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index fd72afb9a..df6bfcbe4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [2.7, 3.5, 3.6, 3.7, 3.8]
+        python-version: [2.7, 3.5, 3.6, 3.7, 3.8, 3.9]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/README.md b/README.md
index 0383737d1..90d5b5c3e 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Alternatively, install directly from the GitHub repository:
 
     pip install git+https://github.com/tweepy/tweepy.git
 
-Python 2.7, 3.5, 3.6, 3.7, & 3.8 are supported.
+Python 2.7, 3.5, 3.6, 3.7, 3.8, & 3.9 are supported.
 
 Community
 ---------
diff --git a/setup.py b/setup.py
index 9491c2ce4..2b0cb1d73 100644
--- a/setup.py
+++ b/setup.py
@@ -68,6 +68,7 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
     ],
     zip_safe=True,
 )
diff --git a/tox.ini b/tox.ini
index 29e99f64c..3374490af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py27, py35, py36, py37, py38
+envlist = py27, py35, py36, py37, py38, py39
 
 [testenv]
 commands = python setup.py nosetests