diff --git a/README.md b/README.md
index f18658fb..99e9dc0a 100644
--- a/README.md
+++ b/README.md
@@ -19,8 +19,9 @@ This library provides an async image downloader with cache support. For convenie
 - [x] Categories for `UIImageView`, `UIButton`, `MKAnnotationView` adding web image and cache management
 - [x] An asynchronous image downloader
 - [x] An asynchronous memory + disk image caching with automatic cache expiration handling
-- [x] A background image decompression
+- [x] A background image decompression to avoid frame rate drop
 - [x] Progressive image loading (including animated image, like GIF showing in Web browser)
+- [x] [Thumbnail image decoding](https://github.com/SDWebImage/SDWebImage/wiki/Advanced-Usage#thumbnail-decoding-550) to save CPU && Memory for large images
 - [x] [Extendable image coder](https://github.com/SDWebImage/SDWebImage/wiki/Advanced-Usage#custom-coder-420) to support massive image format, like WebP
 - [x] [Full-stack solution for animated images](https://github.com/SDWebImage/SDWebImage/wiki/Advanced-Usage#animated-image-50) which keep a balance between CPU && Memory
 - [x] [Customizable and composable transformations](https://github.com/SDWebImage/SDWebImage/wiki/Advanced-Usage#transformer-50) can be applied to the images right after download