diff --git a/README.md b/README.md
index 3583060..160cb6d 100644
--- a/README.md
+++ b/README.md
@@ -77,6 +77,11 @@ imageView.sd_setImageWithURL(NSURL(string: "http://www.domain.com/path/to/image.
 
 - For details about how to use the library and clear examples, see [The detailed How to use](https://raw.github.com/rs/SDWebImage/master/Docs/HowToUse.md)
 
+## Animated Images (GIF) support
+
+- Starting with the 4.0 version, we relly on [FLAnimatedImage](https://github.com/Flipboard/FLAnimatedImage) to take care of our animated images. 
+- To use it, simply make sure you us `FLAnimatedImageView` instead of `UIImageView`.
+- Note: there is a backwards compatible feature, so if you are still trying to load a GIF into a `UIImageView`, it will only show the 1st frame as a static image.
 
 Common Problems
 ---------------