diff --git a/bin/irpf90_indent b/bin/irpf90_indent
index 9702ae2..391d438 100755
--- a/bin/irpf90_indent
+++ b/bin/irpf90_indent
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #   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 9772140..94ebc71 100755
--- a/bin/profile
+++ b/bin/profile
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #   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/pip/irpman b/pip/irpman
index 9aedc6f..da437cf 100755
--- a/pip/irpman
+++ b/pip/irpman
@@ -28,7 +28,7 @@
 
 function run ()
 {
-cat << EOF | exec python - $@
+cat << EOF | exec python2 - $@
 import sys, os
 
 from irpf90_libs.irpf90_t import mandir
diff --git a/src/Makefile b/src/Makefile
index 366d8aa..3bedafe 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1,4 +1,4 @@
-PYTHON=python
+PYTHON=python2
 PYVERSION=$(shell $(PYTHON) -c "import sys; print(sys.version[:3])")
 HAS_CYTHON=$(shell bash -c "which cython &> /dev/null && echo 1 || echo 0")
 ifneq ($(HAS_CYTHON),0)
diff --git a/src/irpf90_python.exe b/src/irpf90_python.exe
index 858b418..c613031 100755
--- a/src/irpf90_python.exe
+++ b/src/irpf90_python.exe
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 #   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/preprocessed_text.py b/src/preprocessed_text.py
index eb3aee8..4b7a8fd 100644
--- a/src/preprocessed_text.py
+++ b/src/preprocessed_text.py
@@ -321,7 +321,7 @@ def execute_templates(text):
         file.close()
         # Execute shell
         import os
-        pipe = os.popen("python < %s"%(scriptname),'r')
+        pipe = os.popen("python2 < %s"%(scriptname),'r')
         lines = pipe.readlines()
         pipe.close()
         result += get_text(lines,scriptname)
diff --git a/tools/commit-msg b/tools/commit-msg
index de8a1e9..5c37748 100755
--- a/tools/commit-msg
+++ b/tools/commit-msg
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import os,sys 
 ROOT = os.path.dirname(__file__)+'/../../'
diff --git a/tools/post-commit b/tools/post-commit
index e1a21b8..4708a76 100755
--- a/tools/post-commit
+++ b/tools/post-commit
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 
 import os
 ROOT = os.path.dirname(__file__)+'/../../'