diff --git a/en/src/elegant-code-base.md b/en/src/elegant-code-base.md
index 3384ff7..b85343e 100644
--- a/en/src/elegant-code-base.md
+++ b/en/src/elegant-code-base.md
@@ -24,7 +24,7 @@ Tutorial [`https://www.flenker.blog/hecto/`](https://www.flenker.blog/hecto/) wi
 [This project](https://github.com/kyclark/command-line-rust) is for the book `Command-Line Rust(O'Reily)`, it will show you how to write small CLIs (clones of `head`, `cat`, `ls`).
 
 ### 5. pngme book
-[This book](https://picklenerd.github.io/pngme_book/) will guide you to make a command line program that lets you hide secret messages in PNG files.  The primary goal here is to get you writing code. The secondary goal is to get you reading documentation.
+[This book](https://jrdngr.github.io/pngme_book/) will guide you to make a command line program that lets you hide secret messages in PNG files.  The primary goal here is to get you writing code. The secondary goal is to get you reading documentation.
 
 ### 6. Writing an OS in Rust
 
@@ -40,7 +40,7 @@ On [CodeCrafters](https://codecrafters.io/for/rust), you can recreate your favor
 
 ### 9. Writing Interpreters in Rust
 
-[This online book](https://github.com/rust-hosted-langs/book) will walk through the basics of interpreted language implementation in Rust with a focus on the challenges that are specific to using Rust.
+[This online book](https://rust-hosted-langs.github.io/book/) will walk through the basics of interpreted language implementation in Rust with a focus on the challenges that are specific to using Rust.
 
 ---
 
diff --git a/zh-CN/src/elegant-code-base.md b/zh-CN/src/elegant-code-base.md
index d5438b7..c643e19 100644
--- a/zh-CN/src/elegant-code-base.md
+++ b/zh-CN/src/elegant-code-base.md
@@ -44,9 +44,9 @@
 
 ### 9. 使用 Rust 写一个解析器
 
-[这本开源书](https://github.com/rust-hosted-langs/book) 是一个使用 Rust 语言实现编译型语言的教程。
+[这本开源书](https://rust-hosted-langs.github.io/book/) 是一个使用 Rust 语言实现编译型语言的教程。
 
 ### 10. Rust编写推箱子游戏教程
 [sokoban](https://sokoban.iolivia.me/zh_cn/c01-00-intro) 是一个使用 Rust 语言实现 sokoban 游戏的教程。虽然社区已停止活跃（ Initial Commits on Sep 3, 2019，GitHub 仓库最后一条 commit 是 last year ），但是项目是完善的 release v0.1.0，拿来练手是个不错的选择。
 
-**To be continued...**
\ No newline at end of file
+**To be continued...**