diff --git a/aliBuild b/aliBuild
index fb52f302..31fccfed 100755
--- a/aliBuild
+++ b/aliBuild
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 from __future__ import print_function
 import os
 import sys
diff --git a/aliDeps b/aliDeps
index 98fd2f67..b2e46bae 100755
--- a/aliDeps
+++ b/aliDeps
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 import os
 from os.path import dirname, join, abspath
diff --git a/aliDoctor b/aliDoctor
index 147af8fa..78f8509f 100755
--- a/aliDoctor
+++ b/aliDoctor
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 import os
 from os.path import dirname, join, abspath
diff --git a/alibuild_helpers/analytics.py b/alibuild_helpers/analytics.py
index 077e3c78..63ee6dbb 100644
--- a/alibuild_helpers/analytics.py
+++ b/alibuild_helpers/analytics.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os, subprocess, sys
 from os.path import exists, expanduser
 from os import unlink
diff --git a/alibuild_helpers/deps.py b/alibuild_helpers/deps.py
index 4069f2f8..2364a141 100644
--- a/alibuild_helpers/deps.py
+++ b/alibuild_helpers/deps.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 
 from __future__ import print_function
 from alibuild_helpers.log import debug, error, info, dieOnError
diff --git a/alibuild_helpers/doctor.py b/alibuild_helpers/doctor.py
index f57d94d0..8c0fa42c 100644
--- a/alibuild_helpers/doctor.py
+++ b/alibuild_helpers/doctor.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import os, re, sys
 from os.path import exists, abspath, expanduser
 import logging
diff --git a/alibuild_helpers/utilities.py b/alibuild_helpers/utilities.py
index 5f5318eb..b15d45a0 100644
--- a/alibuild_helpers/utilities.py
+++ b/alibuild_helpers/utilities.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import yaml
 from os.path import exists
 import hashlib
diff --git a/pb b/pb
index ee539d95..a43f8756 100755
--- a/pb
+++ b/pb
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 import os
 from os.path import dirname, join, abspath
diff --git a/setup.py b/setup.py
index 2a6816cc..f0563cd1 100644
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 """ Package alibuild using setuptools
 """