diff --git a/README.md b/README.md
index 059e190..75e63a4 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,9 @@ Start:May 5.2024
 + [RESTful](https://github.com/snowykte0426/Today-I-Learned/blob/main/Backend/Designing%20a%20RESTful%20API.md)
 ### [Database](https://github.com/snowykte0426/Today-I-Learned/tree/main/Backend/Database)
 + [Relational Database](https://github.com/snowykte0426/Today-I-Learned/blob/main/Backend/Database/Relational%20DataBase.md)
+### [JPA](https://github.com/snowykte0426/Today-I-Learned/tree/main/Backend/JPA)
++ [N+1 Problem](https://github.com/snowykte0426/Today-I-Learned/blob/main/Backend/JPA/N%2B1%20Problem.mdx)
++ [QueryDSL](https://github.com/snowykte0426/Today-I-Learned/blob/main/Backend/JPA/QueryDSL.mdx)
 ### [Spring](https://github.com/snowykte0426/Today-I-Learned/tree/main/Backend/Spring)
 + [Annotation](https://github.com/snowykte0426/Today-I-Learned/blob/main/Backend/Spring/Annotation.md)
 + [Bean LifeCycle,Bean Scope](https://github.com/snowykte0426/Today-I-Learned/blob/main/Backend/Spring/Bean%20LifeCycle%2CScope.md)