diff --git a/setup.py b/setup.py
index 07c9cb1f07..c9984a8902 100644
--- a/setup.py
+++ b/setup.py
@@ -118,6 +118,7 @@ def has_ext_modules(self):
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Scientific/Engineering :: Mathematics",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Topic :: Software Development :: Libraries",