diff --git a/doc/source/user/examples/usage.py b/doc/source/user/examples/usage.py
index 51ff4e2..453df03 100644
--- a/doc/source/user/examples/usage.py
+++ b/doc/source/user/examples/usage.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright (c) 2015 OpenStack Foundation
 #
diff --git a/doc/source/user/examples/usage_simple.py b/doc/source/user/examples/usage_simple.py
index 59eafdd..8a15842 100644
--- a/doc/source/user/examples/usage_simple.py
+++ b/doc/source/user/examples/usage_simple.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright (c) 2015 OpenStack Foundation
 #
diff --git a/doc/source/user/examples/usage_user_identity.py b/doc/source/user/examples/usage_user_identity.py
index 9ad5654..5a28e58 100644
--- a/doc/source/user/examples/usage_user_identity.py
+++ b/doc/source/user/examples/usage_user_identity.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #
 # Copyright (c) 2015 OpenStack Foundation
 #