diff -up yawn-20140318/scripts/yawn.py.orig yawn-20140318/scripts/yawn.py
--- yawn-20140318/scripts/yawn.py.orig	2013-01-18 11:14:45.000000000 +0100
+++ yawn-20140318/scripts/yawn.py	2019-02-18 13:49:23.708720635 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 """
 Script for launching YAWN as a standalone web broswer.
 Note that this is rather for testing purposes, then for production.
diff -up yawn-20140318/scripts/yawn.wsgi.orig yawn-20140318/scripts/yawn.wsgi
--- yawn-20140318/scripts/yawn.wsgi.orig	2013-01-18 11:14:45.000000000 +0100
+++ yawn-20140318/scripts/yawn.wsgi	2019-02-18 13:49:04.332696776 +0100
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
 
 """
 Wrapper for running YAWN application under web server like