From e5e72436b1a2a9fda2c8dabb66d1bedb0573b4a8 Mon Sep 17 00:00:00 2001
From: Meowtec <bertonzh@gmail.com>
Date: Tue, 12 Sep 2017 10:25:54 +0800
Subject: [PATCH] update readme

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index ab33f06..f4d1b0d 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,12 @@ Since version 0.3.0, you can choose the format that you want to convert to. For
 
 But there is an exception: pngquant on windows can't read JPEG files, so if you want to convert JPEG to PNG, you should install ImageMagick firstly, and add it to your PATH environment variable.
 
+Imagine use this command below to check if ImageMagick installed, so make sure it work.
+
+```bash
+magick -version
+```
+
 ## Build and Contribute
 
 ```bash