diff --git a/cleanLocalHdd.py b/cleanLocalHdd.py
index 8f09b5b8d55c2489043e5ac7206b2ea6d914237b..89180ae6089cb7e3aa1ac49beb6912f64e155689 100755
--- a/cleanLocalHdd.py
+++ b/cleanLocalHdd.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # Script cleanLocalHdd.py : listing de l'utilisation et nettoyage des disques locaux sur le cluster
diff --git a/comp.py b/comp.py
index 5969effdaa4fd926e7c01da1ed7d95dbc242458d..36d881fcc7d5ccaae5fd2f16acfb41693b65df67 100755
--- a/comp.py
+++ b/comp.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # Script "comp.py":
diff --git a/externalProgramPath.py b/externalProgramPath.py
index 250cbaa8bc24bcd119e3b38ad52724ce9a3fa888..1bed7a5b2a4cd168f714857690f8ab398815e34b 100755
--- a/externalProgramPath.py
+++ b/externalProgramPath.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # Define external program paths according to local configuration
diff --git a/externalProgramPathGui.pyw b/externalProgramPathGui.pyw
index 990ee5c749a2831d8fc558dcee11550edb60bf5d..39987f0fce3724e29f1c1ab81d85db7bd206ba7d 100755
--- a/externalProgramPathGui.pyw
+++ b/externalProgramPathGui.pyw
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # Gui to configure externals program path according to local configuration
diff --git a/launch.py b/launch.py
index 3500dc610d84143530d52e6e463e414cc998835a..88a5329925f3936494ca7fde9781051f0271c40c 100755
--- a/launch.py
+++ b/launch.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # Script "launch.py": aide au lancement d'un job Metafor
diff --git a/launchGui.pyw b/launchGui.pyw
index 4e15048370837a23d93ebf9fa2a36314715c1d50..ba2e9f7e5adfb7dacec4bb888c560ec4aecf8176 100755
--- a/launchGui.pyw
+++ b/launchGui.pyw
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # GUI de launch.py - version Qt
diff --git a/parametricJob.py b/parametricJob.py
index b5a81d51e585fe7117847faa6e72d5962a1b79a0..d2a210af3619e35aea671dfbafddf13ab95573a8 100644
--- a/parametricJob.py
+++ b/parametricJob.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
 from __future__ import print_function
diff --git a/postProLoop.py b/postProLoop.py
index df6bce6b73064e0fc92cc5486ec9b91f1e207068..9b9017ec097f7d1b0b9f528f0b59b8ac013b2fa7 100755
--- a/postProLoop.py
+++ b/postProLoop.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # $Id: externalProgramPath.py 2645 2016-05-12 06:29:38Z boman $
 #
diff --git a/postProLoopGui.pyw b/postProLoopGui.pyw
index 3de26518df5acc9b997ae250b2f4b61fa0707743..536d62d8fd869aa02bdb9148b509daa7ace9a619 100755
--- a/postProLoopGui.pyw
+++ b/postProLoopGui.pyw
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # $Id: externalProgramPathGui.pyw 2384 2015-09-22 10:07:54Z papeleux $
 #
diff --git a/prmClasses.py b/prmClasses.py
index 01e355ade4c39d35e0ccdb03736ee792a3d9e52c..65b950b36462440632a1167ff4d55eadf493848b 100644
--- a/prmClasses.py
+++ b/prmClasses.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
 # Classes de gestion des parametres
diff --git a/prmClassesGui.py b/prmClassesGui.py
index 6c6b1117a3df9c8382b0a977f33def412da87895..770a2351fda2fe54bc5616070c41d1faf705ab57 100644
--- a/prmClassesGui.py
+++ b/prmClassesGui.py
@@ -1,4 +1,4 @@
-#!python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 # $Id: prmClassesGui.py 2645 2016-05-12 06:29:38Z boman $
 #