From 994d7461fdfbfb0676b8b1d14dc9e2ea8ad86767 Mon Sep 17 00:00:00 2001
From: Ahmed Aboul-Ela <ahmed.aboul3la@gmail.com>
Date: Thu, 17 Dec 2015 14:46:10 +0200
Subject: [PATCH] Update README.md

---
 README.md | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 615ed04..f401789 100644
--- a/README.md
+++ b/README.md
@@ -43,9 +43,25 @@ sudo apt-get install python-dnspython
 
 - Install using pip:
 ```
-pip install dnspython
+sudo pip install dnspython
 ```
 
+####argparse library
+
+- Install for Ubuntu/Debian:
+```
+sudo apt-get install python-argparse
+```
+
+- Install for Centos/Redhat:
+```
+sudo yum install python-argparse
+``` 
+
+- Install using pip:
+```
+sudo pip install argparse
+```
 
 ##Usage