diff --git a/trees_and_graphs/tree_serialization.py b/trees_and_graphs/tree_serialization.py
index 4a927d0..62ea148 100644
--- a/trees_and_graphs/tree_serialization.py
+++ b/trees_and_graphs/tree_serialization.py
@@ -1,3 +1,7 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
 '''
 Serialization is the process of converting a data structure or object into 
 a sequence of bits so that it can be stored in a file or memory buffer, or