diff --git a/book.toml b/book.toml
index 5cad30a..99a6fee 100644
--- a/book.toml
+++ b/book.toml
@@ -1,7 +1,6 @@
 [book]
 authors = ["Lenny Peng"]
 language = "zh"
-multilingual = false
 src = "src"
 title = "Yet another Chinese rust-lang book."
 description = "又一本 rust-lang 书，Yet another Chinese rust-lang book。"