diff --git a/setup.py b/setup.py
index 5c3fd5d..9483dc2 100644
--- a/setup.py
+++ b/setup.py
@@ -161,6 +161,8 @@ setup(
         # 'test': ['coverage'],
     },
 
+    python_requires='>=3',
+
     # If there are data files included in your packages that need to be
     # installed, specify them here.
     #