diff --git a/setup.py b/setup.py
index 1e64b27..06e9003 100755
--- a/setup.py
+++ b/setup.py
@@ -90,6 +90,7 @@ setup(
         'pandas',
         'kerncraft',
     ],
+    python_requires='>=3.5',
 
     # List additional groups of dependencies here (e.g. development
     # dependencies). You can install these using the following syntax,