diff --git a/bin/irpf90_indent b/bin/irpf90_indent
index 2310fdd..9702ae2 100755
--- a/bin/irpf90_indent
+++ b/bin/irpf90_indent
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 #   IRPF90 is a Fortran90 preprocessor written in Python for programming using
 #   the Implicit Reference to Parameters (IRP) method.
 #   Copyright (C) 2009 Anthony SCEMAMA 
diff --git a/bin/profile b/bin/profile
index 39e29e6..9772140 100755
--- a/bin/profile
+++ b/bin/profile
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 #   IRPF90 is a Fortran90 preprocessor written in Python for programming using
 #   the Implicit Reference to Parameters (IRP) method.
 #   Copyright (C) 2009 Anthony SCEMAMA 
diff --git a/packages/make_version.py b/packages/make_version.py
index fbca22a..81bb636 100755
--- a/packages/make_version.py
+++ b/packages/make_version.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 import sys, os
 wd = os.path.abspath(os.path.dirname(__file__))
diff --git a/src/irpf90.py b/src/irpf90.py
index 8df10e3..c0b3937 100644
--- a/src/irpf90.py
+++ b/src/irpf90.py
@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+#cscs /usr/bin/env python
 #   IRPF90 is a Fortran90 preprocessor written in Python for programming using
 #   the Implicit Reference to Parameters (IRP) method.
 #   Copyright (C) 2009 Anthony SCEMAMA 
diff --git a/src/irpf90_python.exe b/src/irpf90_python.exe
index 85de59e..858b418 100755
--- a/src/irpf90_python.exe
+++ b/src/irpf90_python.exe
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 #   IRPF90 is a Fortran90 preprocessor written in Python for programming using
 #   the Implicit Reference to Parameters (IRP) method.
 #   Copyright (C) 2009 Anthony SCEMAMA 
diff --git a/tools/commit-msg b/tools/commit-msg
index f6bebb6..de8a1e9 100755
--- a/tools/commit-msg
+++ b/tools/commit-msg
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 import os,sys 
 ROOT = os.path.dirname(__file__)+'/../../'
diff --git a/tools/post-commit b/tools/post-commit
index aff0c83..e1a21b8 100755
--- a/tools/post-commit
+++ b/tools/post-commit
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 import os
 ROOT = os.path.dirname(__file__)+'/../../'