diff --git a/tools/dtoc/dtoc.py b/tools/dtoc/dtoc.py
index 514e0dd4a34b683c53c40898539583044ddaf5ff..b3596a5918fe2a1f420064a25eec01da5a63f684 100755
--- a/tools/dtoc/dtoc.py
+++ b/tools/dtoc/dtoc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python2
+#!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2016 Google, Inc
diff --git a/tools/dtoc/test_dtoc.py b/tools/dtoc/test_dtoc.py
old mode 100644
new mode 100755
index b915b278560411a776d2e3e679e6fc639787e02e..d733b70655865584dad970b556dd88ecf484b40a
--- a/tools/dtoc/test_dtoc.py
+++ b/tools/dtoc/test_dtoc.py
@@ -1,3 +1,4 @@
+#!/usr/bin/env python3
 # SPDX-License-Identifier: GPL-2.0+
 # Copyright (c) 2012 The Chromium OS Authors.
 #