diff --git a/setup.py b/setup.py
index 3d3b33248..027b1f923 100644
--- a/setup.py
+++ b/setup.py
@@ -70,6 +70,7 @@ def find_all_files(directory, endings=None):
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Operating System :: Microsoft :: Windows",
         "Operating System :: MacOS :: MacOS X",
         "Operating System :: POSIX :: Linux",