diff --git a/README.md b/README.md
index 0f2d562..a7af7d3 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 [![codebeat badge](https://codebeat.co/badges/1a06ccdf-73a1-4e8c-bf84-b40c8f6beeb2)](https://codebeat.co/projects/github-com-yi-ge-unxz-master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/yi-ge/unxz)](https://goreportcard.com/report/github.com/yi-ge/unxz)
 
+Golang \*.tar.xz decompress.
+
 ## Usage
 
 ```golang