diff --git a/lib/configure.py b/lib/configure.py
index f7941b533d..ca62e65d63 100644
--- a/lib/configure.py
+++ b/lib/configure.py
@@ -1,4 +1,4 @@
-#! /usr/bin/python
+#! /usr/bin/python3
 # -*- coding: utf-8 -*-
 #
 # file configure.py
diff --git a/lib/scripts/gnuplot2pdf.py b/lib/scripts/gnuplot2pdf.py
index 33fe767492..3ada4f5ed5 100755
--- a/lib/scripts/gnuplot2pdf.py
+++ b/lib/scripts/gnuplot2pdf.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 
 from subprocess import Popen, PIPE
 from sys import argv, stderr, exit