diff --git a/villas/dataprocessing/readtools.py b/villas/dataprocessing/readtools.py
index cc385f56171f017456c9ed0ff6184c6247cf36a4..19935a7a6bb6542b0484b8e8370a7a21ea35806a 100644
--- a/villas/dataprocessing/readtools.py
+++ b/villas/dataprocessing/readtools.py
@@ -1,3 +1,6 @@
+#!/usr/bin/python
+# -*- coding: UTF-8 -*-
+
 import numpy as np
 import pandas as pd
 import re