diff --git a/tools/ccfg-merge-debug b/tools/ccfg-merge-debug
index 59c573a..3d60f7f 100755
--- a/tools/ccfg-merge-debug
+++ b/tools/ccfg-merge-debug
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 
 from cloudinit import handlers
 from cloudinit.handlers import cloud_config as cc_part
diff --git a/tools/cloudconfig-schema b/tools/cloudconfig-schema
index 32f0d61..abba445 100755
--- a/tools/cloudconfig-schema
+++ b/tools/cloudconfig-schema
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 # This file is part of cloud-init. See LICENSE file for license information.
 
 """cloudconfig-schema
diff --git a/tools/migrate-lp-user-to-github b/tools/migrate-lp-user-to-github
index f1247cb..d0bc890 100755
--- a/tools/migrate-lp-user-to-github
+++ b/tools/migrate-lp-user-to-github
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 """Link your Launchpad user to github, proposing branches to LP and Github"""
 
 from argparse import ArgumentParser
diff --git a/tools/mock-meta.py b/tools/mock-meta.py
index 9dd067b..298ba23 100755
--- a/tools/mock-meta.py
+++ b/tools/mock-meta.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 
 # Provides a somewhat random, somewhat compat, somewhat useful mock version of
 # http://docs.amazonwebservices.com
diff --git a/tools/pipremove b/tools/pipremove
index e1213ed..409a955 100755
--- a/tools/pipremove
+++ b/tools/pipremove
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 import subprocess
 import sys
 
diff --git a/tools/read-dependencies b/tools/read-dependencies
index 6ad5f70..16dcc47 100755
--- a/tools/read-dependencies
+++ b/tools/read-dependencies
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 """List pip dependencies or system package dependencies for cloud-init."""
 
 # You might be tempted to rewrite this as a shell script, but you
diff --git a/tools/read-version b/tools/read-version
index 79755f7..334f2c0 100755
--- a/tools/read-version
+++ b/tools/read-version
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 
 import os
 import json
diff --git a/tools/render-cloudcfg b/tools/render-cloudcfg
index ed45484..459d543 100755
--- a/tools/render-cloudcfg
+++ b/tools/render-cloudcfg
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 
 import argparse
 import os
diff --git a/tools/validate-yaml.py b/tools/validate-yaml.py
index d8bbcfc..a29dfd4 100755
--- a/tools/validate-yaml.py
+++ b/tools/validate-yaml.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python3
+#!/usr/bin/env python33
 
 """Try to read a YAML file and report any errors.
 """