diff --git a/extensions/fablabchemnitz_inkcut_open.py b/extensions/fablabchemnitz_inkcut_open.py
index 1b2f82b5..7609ddb5 100644
--- a/extensions/fablabchemnitz_inkcut_open.py
+++ b/extensions/fablabchemnitz_inkcut_open.py
@@ -1,5 +1,5 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
+#!/usr/bin/env python3
+
 """
 Inkcut, Plot HPGL directly from Inkscape.
    extension.py
@@ -66,4 +66,4 @@ class InkscapeInkcutPlugin(inkex.Effect):
         # https://bugs.python.org/issue26741.
         p.returncode = 0
 
-InkscapeInkcutPlugin().run()
+InkscapeInkcutPlugin().run()
\ No newline at end of file