diff --git a/untls_proxy.py b/untls_proxy.py
old mode 100644
new mode 100755
index 718fe97..1f8058c
--- a/untls_proxy.py
+++ b/untls_proxy.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # CC0 1.0 Universal
 #
 # Statement of Purpose