diff --git a/setup.cfg b/setup.cfg
index df744672f..0ed12927e 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -30,7 +30,7 @@ classifiers =
 
 [options]
 packages = find_namespace:
-python_requires = >=3.8.1
+python_requires = >=3.8.1,<3.9
 install_requires =
     aiohttp==3.6.2
     aiohttp-json-rpc==0.13.2