Update README.md

jleclanche · web-flow · commit 172fe4733acd · 2019-04-23T06:48:58.000+02:00
diff --git a/README.md b/README.md
@@ -1,6 +1,10 @@
 # python-bna
 [![Build Status](https://api.travis-ci.org/jleclanche/python-bna.svg?branch=master)](https://travis-ci.org/jleclanche/python-bna)
 
+## Requirements
+
+- Python 3.6+
+
 
 ## Command-line usage
 
