diff --git a/README.md b/README.md
index ad9c7350f0941d663a398b24d7147b39a5871571..9cb620464b9223b74e2c1eb97f42d045c5b423bf 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,8 @@ pip install imgyaso
 pip install git+https://github.com/apachecn/imgyaso
 ```
 
+并且安装 [ImageMagick](https://imagemagick.org/script/download.php) 和 [pngquant](https://pngquant.org/)。
+
 ## 使用说明
 
 ```