From 5445d8abac6561dc4f661c1952bda858eae6bf80 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tr=E1=BA=A7n=20Qu=E1=BB=91c=20C=C6=B0=E1=BB=9Dng?=
 <trquoccuong@gmail.com>
Date: Sun, 19 Feb 2017 23:57:14 +0700
Subject: [PATCH] Update README.md

---
 README.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index d612045..509f0b7 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # Node wave
 > Render audio waveform like SoundCloud on backend
-
+Now we have 2 version 0.0.4 and 0.0.3
+0.0.4:  I used `ffmpeg`, It take less cpu and memory than version 0.0.3 but you need to install `ffmpeg`
 ## Install
 
 ```
@@ -23,6 +24,7 @@ Waveform('< mp3 link >', options, function(err , buffer) {
 
 ## Requirement
  This module base on `web-audio-api` and `canvas` modules.
+ You need to install `Cairo`. Follow install `canvas` instructor https://www.npmjs.com/package/canvas
  
 ## Attribute