diff --git a/book.toml b/book.toml
index e2b9929..0cddb7c 100644
--- a/book.toml
+++ b/book.toml
@@ -5,8 +5,5 @@ multilingual = false
 src = "src"
 title = "Denops Documentation"
 
-[build]
-build-dir = "docs"
-
 [preprocessor.plantuml]
 plantuml-cmd="http://www.plantuml.com/plantuml"