diff --git a/build.py b/build.py
index 4b9a695b..b75f2173 100755
--- a/build.py
+++ b/build.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 from __future__ import division, absolute_import, print_function, unicode_literals