diff --git a/tools/apk_masseur.py b/tools/apk_masseur.py
index b1ea43e..b363bb7 100755
--- a/tools/apk_masseur.py
+++ b/tools/apk_masseur.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.