diff --git a/setup.py b/setup.py
index 4849574a..9c6c377c 100755
--- a/setup.py
+++ b/setup.py
@@ -51,6 +51,7 @@ def version():
         ],
         keywords='automation, pep8, format, pycodestyle',
         install_requires=INSTALL_REQUIRES,
+        python_requires=">=3.6",
         test_suite='test.test_autopep8',
         py_modules=['autopep8'],
         zip_safe=False,