diff --git a/cluster-autoscaler/update_toc.py b/cluster-autoscaler/update_toc.py
index 4af4664f2398..34a7d2639b51 100755
--- a/cluster-autoscaler/update_toc.py
+++ b/cluster-autoscaler/update_toc.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2017 The Kubernetes Authors.
 #
diff --git a/hack/boilerplate/boilerplate.py b/hack/boilerplate/boilerplate.py
index f12dfeeffd4b..9c374c4c0469 100755
--- a/hack/boilerplate/boilerplate.py
+++ b/hack/boilerplate/boilerplate.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2015 The Kubernetes Authors.
 #
diff --git a/hack/boilerplate/boilerplate.py.txt b/hack/boilerplate/boilerplate.py.txt
index a2e72e5988e7..9fdb989ce7c5 100644
--- a/hack/boilerplate/boilerplate.py.txt
+++ b/hack/boilerplate/boilerplate.py.txt
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright YEAR The Kubernetes Authors.
 #
diff --git a/hack/scripts/break_mig.py b/hack/scripts/break_mig.py
index 53858892d590..f487ce2c5911 100755
--- a/hack/scripts/break_mig.py
+++ b/hack/scripts/break_mig.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2017 The Kubernetes Authors.
 #
@@ -41,11 +41,6 @@
 import sys
 import time
 
-try:
-  range = xrange   # Python 2
-except NameError:  # Python 3
-  pass
-
 
 InstanceInfo = collections.namedtuple("InstanceInfo", 'name ip')
 
diff --git a/hack/scripts/ca_metrics_parser.py b/hack/scripts/ca_metrics_parser.py
index 155bdbef6fb0..51083c0d74ec 100755
--- a/hack/scripts/ca_metrics_parser.py
+++ b/hack/scripts/ca_metrics_parser.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 # Copyright 2017 The Kubernetes Authors.
 #
@@ -22,11 +22,6 @@
 import argparse
 import json
 
-try:
-  range = xrange   # Python 2
-except NameError:  # Python 3
-  pass
-
 
 class CAMetric(object):