diff --git a/setup.py b/setup.py
index 5ded4c8d..a997e6ff 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,8 @@
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
-        'Programming Language :: Python :: 3.10'],
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11'],
 
     packages=_muscle3_packages,
     package_dir={