diff --git a/logistics.py b/logistics.py
index ee35ef1..e740652 100644
--- a/logistics.py
+++ b/logistics.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# coding: utf-8
+# coding: utf-8 versionbeta
 import numpy as np
 import matplotlib.pyplot as plt