diff --git a/arrays_and_strings/array-remove-duplicate-inplace.py b/arrays_and_strings/array-remove-duplicate-inplace.py
index c46d100..18d794f 100644
--- a/arrays_and_strings/array-remove-duplicate-inplace.py
+++ b/arrays_and_strings/array-remove-duplicate-inplace.py
@@ -1,3 +1,7 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
 ### Remove Duplicates from Sorted Array in-place