README.md in rbpdf-1.19.8 vs README.md in rbpdf-1.20.0

@@ -13,12 +13,12 @@
 * Use UTF-8 encoding. 
 * RTL (Right-To-Left) languages support.
 * HTML tag support.
 * CSS minimum support.
 * Image
- - 8bit PNG image support without RMagick library.
- - PNG(with alpha channel)/JPEG/GIF image support. (use RMagick library)
+ - 8bit PNG image support without MiniMagick/RMagick library.
+ - PNG(with alpha channel)/JPEG/GIF image support. (use MiniMagick or RMagick library)
 
 
 ##
 ## Installing RBPDF
 ##
@@ -26,9 +26,13 @@
 RBPDF is distributed via RubyGems, and can be installed the usual way that you install gems: by simply typing `gem install rbpdf` on the command line. 
 
 ==
 
 If you are using image file, it is recommended you install:
+```
+gem install mini_magick
+```
+or
 ```
 gem install rmagick
 ```
 
 RBPDF Example of simple use in .html.erb: