diff --git a/docs/book.toml b/docs/book.toml
index aebc721..1678248 100644
--- a/docs/book.toml
+++ b/docs/book.toml
@@ -4,5 +4,22 @@ language = "cn"
 multilingual = false
 src = "src"
 title = "简明 zCore 教程"
+[rust]
+edition = "2018"
 [output.html.playpen]
 editable = true
+[output.html]
+git-repository-url = "https://github.com/rcore-os/zCore-Tutorial"
+# mathjax-support = true
+# [preprocessor.mathjax]
+# renderers = ["html"]
+[output.html.search]
+enable = true
+limit-results = 30
+teaser-word-count = 30
+use-boolean-and = true
+boost-title = 2
+boost-hierarchy = 1
+boost-paragraph = 1
+expand = true
+heading-split-level = 3
\ No newline at end of file
diff --git a/docs/src/ch01-01-kernel-object.md b/docs/src/ch01-01-kernel-object.md
index d7dc10b..ee06cf0 100644
--- a/docs/src/ch01-01-kernel-object.md
+++ b/docs/src/ch01-01-kernel-object.md
@@ -113,6 +113,7 @@ Rust 是一门部分面向对象的语言，我们通常用它的 trait 实现
 首先创建一个 `KernelObject` trait 作为内核对象的公共接口：
 
 ```rust,noplaypen
+use alloc::string::String;
 // src/object/mod.rs
 /// 内核对象公共接口
 pub trait KernelObject: Send + Sync {