diff --git a/python/setup.py b/python/setup.py
index 33d74203c366..e0760f0e0d9f 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -308,4 +308,5 @@ def get_option_from_sys_argv(option_str):
       },
       install_requires=install_requires,
       ext_modules=ext_module_list,
+      python_requires='>=3.5',
   )