diff --git a/setup.py b/setup.py
index b99f51c..5c89e2b 100644
--- a/setup.py
+++ b/setup.py
@@ -59,6 +59,7 @@ def read(*names, **kwargs):
         'Topic :: Software Development :: Embedded Systems',
         'Topic :: Utilities',
     ],
+    python_requires='>=3.6',
     keywords=[
     ],
     install_requires=[