diff --git a/scripts/fixpermission.sh b/scripts/fixpermission.sh
index b5be645..c279ddc 100755
--- a/scripts/fixpermission.sh
+++ b/scripts/fixpermission.sh
@@ -1,8 +1,13 @@
-#!/bin/sh
-# usage:
-#####################################################
-# directory
-[ "$1" = "" ] && return 0
+#!/usr/bin/env bash
 
-find "$1" -type d -print0 | xargs -0 chmod 755
-find "$1" -type f -print0 | xargs -0 chmod 644
+# Fix file permission
+# Min. Requirement  : GNU/Linux Ubuntu 14.04 & 16.04
+# Last Build        : 17/07/2019
+# Author            : ESLabs.ID (eslabs.id@gmail.com)
+# Since Version     : 1.0.0
+
+# directory
+[ "${1}" = "" ] && return 0
+
+find "${1}" -type d -print0 | xargs -0 chmod 755
+find "${1}" -type f -print0 | xargs -0 chmod 644