diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index a089cf6..a7ccd13 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,9 +1,10 @@
 CHANGELOG
 =========
 
-Unreleased
-----------
+0.9.0 (2022-10-28)
+------------------
 
+* Python 3.11 is officially supported.
 * Dropped support for Python 3.6.
 
 0.8.0 (2022-05-26)
diff --git a/setup.py b/setup.py
index 972c84d..52532ee 100644
--- a/setup.py
+++ b/setup.py
@@ -33,6 +33,7 @@
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: Implementation :: CPython",
         "Operating System :: OS Independent",
         "License :: OSI Approved :: MIT License",