diff --git a/README.md b/README.md
index 057bd70..e0cf492 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,7 @@
 - [타입 캐스팅](https://github.com/simoniful/iOS_Recording/issues/55)
 - [중첩 타입](https://github.com/simoniful/iOS_Recording/issues/56)
 - [익스텐션](https://github.com/simoniful/iOS_Recording/issues/57)
+- [프로토콜](https://github.com/simoniful/iOS_Recording/issues/58)
 
 ## CS
 - [Network(1)](https://github.com/simoniful/iOSRecording/issues/11)