diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index a1abebf..052e845 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "pypy-3.8"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "pypy-3.8"]
 
     steps:
       - name: Install libgnutls28-dev
diff --git a/setup.py b/setup.py
index 5012705..b5513a9 100644
--- a/setup.py
+++ b/setup.py
@@ -73,6 +73,7 @@ setup(
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
diff --git a/tox.ini b/tox.ini
index 2db0650..4c14821 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,7 @@ skip_missing_interpreters=true
 envlist =
   cov-clean,
   lint,
-  {py37,py38,py39,py310}-{requests,httplib2,urllib3,tornado4,boto3,aiohttp,httpx},
+  {py37,py38,py39,py310,py311}-{requests,httplib2,urllib3,tornado4,boto3,aiohttp,httpx},
   {pypy3}-{requests,httplib2,urllib3,tornado4,boto3},
   {py310}-httpx019,
   cov-report
@@ -15,6 +15,7 @@ python =
     3.8: py38
     3.9: py39
     3.10: py310, lint
+    3.11: py311
     pypy-3: pypy3
 
 # Coverage environment tasks: cov-clean and cov-report
@@ -97,8 +98,8 @@ deps =
     httpx019: httpx==0.19
     {py37,py38,py39,py310}-{httpx}: pytest-asyncio
 depends =
-  lint,{py37,py38,py39,py310,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py37,py38,py39,py310}-{aiohttp},{py37,py38,py39,py310}-{httpx}: cov-clean
-  cov-report: lint,{py37,py38,py39,py310,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py37,py38,py39,py310}-{aiohttp}
+  lint,{py37,py38,py39,py310,py311,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py37,py38,py39,py310,py311}-{aiohttp},{py37,py38,py39,py310,py311}-{httpx}: cov-clean
+  cov-report: lint,{py37,py38,py39,py310,py311,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py37,py38,py39,py310,py311}-{aiohttp}
 passenv =
     AWS_ACCESS_KEY_ID
     AWS_DEFAULT_REGION