diff --git a/setup.py b/setup.py
index 967b1bb4..43d6d5b6 100644
--- a/setup.py
+++ b/setup.py
@@ -98,6 +98,7 @@ setup(name='dependency-injector',
           'Programming Language :: Python :: 3.6',
           'Programming Language :: Python :: 3.7',
           'Programming Language :: Python :: 3.8',
+          'Programming Language :: Python :: 3.9',
           'Programming Language :: Python :: Implementation :: CPython',
           'Programming Language :: Python :: Implementation :: PyPy',
           'Framework :: AsyncIO',