diff --git a/setup.py b/setup.py
index 41870f8..850c110 100644
--- a/setup.py
+++ b/setup.py
@@ -80,6 +80,7 @@ setup(
     long_description_content_type='text/markdown',
     name='octodns',
     packages=find_packages(),
+    python_requires='>=3.6',
     url='https://github.com/octodns/octodns',
     version=octodns.__VERSION__,
 )