diff --git a/pubsub/setup.py b/pubsub/setup.py
index e26fb4b75778..69f19b3db72e 100644
--- a/pubsub/setup.py
+++ b/pubsub/setup.py
@@ -84,7 +84,7 @@
     namespace_packages=namespaces,
     install_requires=dependencies,
     extras_require=extras,
-    python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*",
+    python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*",
     include_package_data=True,
     zip_safe=False,
 )