diff --git a/metadata.yaml b/metadata.yaml
index 19bc80f..0cea259 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -2,5 +2,5 @@
 title: 设计数据密集型应用
 author: Martin Kleppmann
 rights:  Creative Commons Non-Commercial Share Alike 3.0
-language: 中文
+language: zh
 cover-image: ./static/title.jpg