diff --git a/acme-dns-auth.py b/acme-dns-auth.py
index 59d81b9..f70ec60 100755
--- a/acme-dns-auth.py
+++ b/acme-dns-auth.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import json
 import os
 import requests