diff --git a/.travis.yml b/.travis.yml
index 7f0543b..cf7fa85 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -26,6 +26,12 @@ matrix:
   - python: "3.8"
     env: TOX_ENV=py38-django30
   - python: "3.8"
+    env: TOX_ENV=py38-django31
+  - python: "3.9"
+    env: TOX_ENV=py39-django30
+  - python: "3.9"
+    env: TOX_ENV=py39-django31
+  - python: "3.9"
     env: TOX_ENV=coverage
 cache:
   directories:
diff --git a/README.rst b/README.rst
index 87b663f..afd3fba 100644
--- a/README.rst
+++ b/README.rst
@@ -21,7 +21,7 @@ Features
 * Possibility to rename/rewrite attributes per service
 * Possibility to require some attribute values per service
 * Federated mode between multiple CAS
-* Supports Django 1.11, 2.2 and 3.0
+* Supports Django 1.11, 2.2 and 3.1
 * Supports Python 2.7, 3.5+
 
 Dependencies
@@ -29,7 +29,7 @@ Dependencies
 
 ``django-cas-server`` depends on the following python packages:
 
-* Django >= 1.11 < 3.1
+* Django >= 1.11 < 3.2
 * requests >= 2.4
 * requests_futures >= 0.9.5
 * lxml >= 3.4
diff --git a/setup.py b/setup.py
index 38cfb70..417892e 100644
--- a/setup.py
+++ b/setup.py
@@ -36,6 +36,7 @@ if __name__ == '__main__':
             'Framework :: Django :: 2.1',
             'Framework :: Django :: 2.2',
             'Framework :: Django :: 3.0',
+            'Framework :: Django :: 3.1',
             'Intended Audience :: Developers',
             'Intended Audience :: System Administrators',
             'License :: OSI Approved :: GNU General Public License v3 (GPLv3)',
@@ -48,6 +49,7 @@ if __name__ == '__main__':
             'Programming Language :: Python :: 3.6',
             'Programming Language :: Python :: 3.7',
             'Programming Language :: Python :: 3.8',
+            'Programming Language :: Python :: 3.9',
             'Topic :: Software Development :: Libraries :: Python Modules',
             'Topic :: Internet :: WWW/HTTP',
             'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
@@ -62,7 +64,7 @@ if __name__ == '__main__':
         },
         keywords=['django', 'cas', 'cas3', 'server', 'sso', 'single sign-on', 'authentication', 'auth'],
         install_requires=[
-            'Django >= 1.11,<3.1', 'requests >= 2.4', 'requests_futures >= 0.9.5',
+            'Django >= 1.11,<3.2', 'requests >= 2.4', 'requests_futures >= 0.9.5',
             'lxml >= 3.4', 'six >= 1'
         ],
         url="https://github.com/nitmir/django-cas-server",
diff --git a/tox.ini b/tox.ini
index c398c06..a8a45d5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,9 +9,15 @@ envlist=
     py36-django22,
     py37-django22,
     py38-django22,
+    py39-django22,
     py36-django30,
     py37-django30,
     py38-django30,
+    py39-django30,
+    py36-django31,
+    py37-django31,
+    py38-django31,
+    py39-django31,
 
 [flake8]
 max-line-length=100
@@ -37,54 +43,12 @@ commands=
     {[post_cmd]commands}
 whitelist_externals={[post_cmd]whitelist_externals}
 
-[testenv:py27-django17]
-basepython=python2.7
-deps =
-    Django>=1.7,<1.8
-    {[base]deps}
-
-[testenv:py27-django18]
-basepython=python2.7
-deps =
-    Django>=1.8,<1.9
-    {[base]deps}
-
-[testenv:py27-django19]
-basepython=python2.7
-deps =
-    Django>=1.9,<1.10
-    {[base]deps}
-
-[testenv:py27-django110]
-basepython=python2.7
-deps =
-    Django>=1.10,<1.11
-    {[base]deps}
-
 [testenv:py27-django111]
 basepython=python2.7
 deps =
     Django>=1.11,<1.12
     {[base]deps}
 
-[testenv:py34-django17]
-basepython=python3.4
-deps =
-    Django>=1.7,<1.8
-    {[base]deps}
-
-[testenv:py34-django18]
-basepython=python3.4
-deps =
-    Django>=1.8,<1.9
-    {[base]deps}
-
-[testenv:py35-django110]
-basepython=python3.5
-deps =
-    Django>=1.10,<1.11
-    {[base]deps}
-
 [testenv:py35-django111]
 basepython=python3.5
 deps =
@@ -97,34 +61,10 @@ deps =
     Django>=1.11,<1.12
     {[base]deps}
 
-[testenv:py35-django20]
-basepython=python3.5
-deps =
-    Django>=2.0,<2.1
-    {[base]deps}
-
-[testenv:py36-django20]
-basepython=python3.6
-deps =
-    Django>=2.0,<2.1
-    {[base]deps}
-
-[testenv:py35-django21]
-basepython=python3.5
-deps =
-    Django>=2.1,<2.2
-    {[base]deps}
-
-[testenv:py36-django21]
-basepython=python3.6
-deps =
-    Django>=2.1,<2.2
-    {[base]deps}
-
-[testenv:py37-django21]
+[testenv:py37-django111]
 basepython=python3.7
 deps =
-    Django>=2.1,<2.2
+    Django>=1.11,<1.12
     {[base]deps}
 
 [testenv:py36-django22]
@@ -145,6 +85,12 @@ deps =
     Django>=2.2,<3.0
     {[base]deps}
 
+[testenv:py39-django22]
+basepython=python3.9
+deps =
+    Django>=2.2,<3.0
+    {[base]deps}
+
 [testenv:py36-django30]
 basepython=python3.6
 deps =
@@ -163,6 +109,36 @@ deps =
     Django>=3.0,<3.1
     {[base]deps}
 
+[testenv:py39-django30]
+basepython=python3.9
+deps =
+    Django>=3.0,<3.1
+    {[base]deps}
+
+[testenv:py36-django31]
+basepython=python3.6
+deps =
+    Django>=3.1,<3.2
+    {[base]deps}
+
+[testenv:py37-django31]
+basepython=python3.7
+deps =
+    Django>=3.1,<3.2
+    {[base]deps}
+
+[testenv:py38-django31]
+basepython=python3.8
+deps =
+    Django>=3.1,<3.2
+    {[base]deps}
+
+[testenv:py39-django31]
+basepython=python3.9
+deps =
+    Django>=3.1,<3.2
+    {[base]deps}
+
 
 [testenv:flake8]
 basepython=python3