diff --git a/gsutil.py b/gsutil.py
index 46682c572..d5423ad7e 100755
--- a/gsutil.py
+++ b/gsutil.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.