diff --git a/setup.py b/setup.py
index 39bb41930..6fc7c4747 100644
--- a/setup.py
+++ b/setup.py
@@ -67,5 +67,5 @@
                'checker typehints typehinting typechecking backport',
       package_dir={'': package_dir},
       py_modules=['typing'],
-      python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
+      python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, <3.5',
       classifiers=classifiers)