From 1eee78cfbcd792d6853ce1a745fd8f989f4c6bbc Mon Sep 17 00:00:00 2001
From: Vincent Wei <vincent@minigui.org>
Date: Sun, 14 Apr 2019 18:25:43 +0800
Subject: [PATCH] tune

---
 README.md | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 3c8eccdb..7252d475 100644
--- a/README.md
+++ b/README.md
@@ -109,13 +109,14 @@ This instruction assumes that you are using Ubuntu Linux.
 
 ### Prerequisites
 
-You can run `apt install <package_name>` to install the software on Ubuntu Linux.
+You should run `apt install <package_name>` to install the following packages 
+on your Ubuntu Linux.
 
  * Building tools:
     * autoconf
  * Dependent libraries (all are optional):
     * libjpeg64-dev
-    * libpng12-dev
+    * libpng12-dev (use libpng-dev on Ubuntu Linux 18.04 LTS)
     * libfreetype6-dev
 
 ### Building MiniGUI Core