diff --git a/README.md b/README.md
index 48df52f..c3b61d4 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,8 @@ However, coders pefer using jar package instead of source java code in personal
 
 Update 20181119: sync from [webp project of Luciad](https://bitbucket.org/luciad/webp-imageio) 1.0.0
 
+Update 20190912: update win64 dll to libwebp-1.0.3
+
 Update 20191029: [prankstrisse](https://github.com/prankstrisse) provides osx64 dylib file
 
 ## Usage