diff --git a/snail.py b/snail.py
index b797ccd..99ae8e5 100644
--- a/snail.py
+++ b/snail.py
@@ -1,3 +1,5 @@
+#!/bin/env python3
+
 def snail(xss):
     h = len(xss)
     w = len(xss[0])