diff --git a/launch/dns.py b/launch/dns.py
index 9f2b4a9373..01d6931ed7 100755
--- a/launch/dns.py
+++ b/launch/dns.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Launch a new OpenStack project infrastructure node.
 
diff --git a/launch/sshclient.py b/launch/sshclient.py
index 1c23aafda4..8ff86ca315 100644
--- a/launch/sshclient.py
+++ b/launch/sshclient.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Update the base image that is used for devstack VMs.
 
diff --git a/launch/utils.py b/launch/utils.py
index 3e1387dfe2..4c9bf9dd5f 100644
--- a/launch/utils.py
+++ b/launch/utils.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Update the base image that is used for devstack VMs.