diff --git a/ChangeLog.md b/ChangeLog.md
index 834834d..3482e37 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,7 +3,7 @@
 ### 2022-03-11
 
 - Add one exercise in [Patterns](https://practice.rs/pattern-match/patterns.html)
-
+- Add [Result and ?](https://practice.rs/result-panic/result.html)
 
 ### 2022-03-10
 
diff --git a/Readme.md b/Readme.md
index 1ac6268..1b2a612 100644
--- a/Readme.md
+++ b/Readme.md
@@ -2,7 +2,7 @@
 
 This book was designed for easily diving into and get skilled with Rust, and it's very easy to use: All you need to do is to make each exercise compile without ERRORS and Panics !
 
-> 🎊 Updated on 2022-03-10: Add [Panics](https://practice.rs/result-panic/panic.html)
+> 🎊 Updated on 2022-03-11: Add [Result and ?](https://practice.rs/result-panic/result.html)
 
 ## Reading online
 
diff --git a/src/SUMMARY.md b/src/SUMMARY.md
index 919011e..62baa6d 100644
--- a/src/SUMMARY.md
+++ b/src/SUMMARY.md
@@ -38,7 +38,7 @@
   - [Others](type-conversions/others.md)
 - [Result and panic](result-panic/intro.md)
   - [panic!](result-panic/panic.md)
-  - [result and ?](result-panic/result.md)
+  - [Result and ?](result-panic/result.md)
 - [Crate and module TODO](crate-module/intro.md)
   - [Crate](crate-module/crate.md)
   - [Module](crate-module/module.md)