diff --git a/book.toml b/book.toml
index d0de1fa..8bae1c4 100644
--- a/book.toml
+++ b/book.toml
@@ -2,7 +2,7 @@
 title = "学习 Zig"
 description = "Learning Zig 中文翻译"
 authors = ["ZigCC"]
-language = "cn"
+language = "zh-CN"
 multilingual = false
 src = "."
 
@@ -17,4 +17,4 @@ enable = true    # include support for printable output
 page-break = true # insert page-break after each chapter
 
 [output.html.search]
-enable = true
\ No newline at end of file
+enable = true