diff --git a/cleanup/remove_unnecessary_spaces.py b/cleanup/remove_unnecessary_spaces.py
index 0755a70a..fa868b84 100755
--- a/cleanup/remove_unnecessary_spaces.py
+++ b/cleanup/remove_unnecessary_spaces.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 # copyright: B1 Systems GmbH   <info@b1-systems.de>,    2013.
 #    author: Christian Berendt <berendt@b1-systems.de>, 2013.
diff --git a/cleanup/retf/retf.py b/cleanup/retf/retf.py
index aecae03e..88b6f825 100755
--- a/cleanup/retf/retf.py
+++ b/cleanup/retf/retf.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/env python
 
 """This script applies a set of regular expressions onto a set of files
 to automatically identify and fix typographical errors.