diff --git a/README.md b/README.md
index 3d73e8b..59a9d52 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,7 @@ Demo site: [https://foto.lhzhang.com](https://foto.lhzhang.com)
 
 - `Simple` One binary, three commands. No database.
 - `Customizable` Highly customizable by configuration and template files.
+- `Fast` Files are handled concurrently.
 
 ## Install