diff --git a/README.md b/README.md
index a41a51b..6c85807 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@ A helper library for the [aubrey](https://github.com/unt-libraries/aubrey) digit
 Requirements
 ------------
 
-* Python ~= 3.7.0
+* Python 3.7 - 3.9
 * libxml2
 * libxslt
 
diff --git a/setup.py b/setup.py
index 07f5cdd..ea770de 100644
--- a/setup.py
+++ b/setup.py
@@ -22,5 +22,7 @@
         'Natural Language :: English',
         'Programming Language :: Python',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ]
 )
diff --git a/tox.ini b/tox.ini
index 532e11b..b2f38af 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py36, py37, py37-flake8
+envlist = py{37,38,39}, py39-flake8
 
 [flake8]
 max-line-length = 99
@@ -9,6 +9,6 @@ deps = -rrequirements-test.txt
        pip >= 18.0.1
 commands = pytest
 
-[testenv:py37-flake8]
+[testenv:py39-flake8]
 deps = flake8
 commands = flake8 aubreylib tests setup.py