diff --git a/backend/src/main/java/com/example/booktree/blog/service/BlogService.java b/backend/src/main/java/com/example/booktree/blog/service/BlogService.java
index 83493aba..1f460196 100644
--- a/backend/src/main/java/com/example/booktree/blog/service/BlogService.java
+++ b/backend/src/main/java/com/example/booktree/blog/service/BlogService.java
@@ -69,6 +69,7 @@ public Blog findBlogByToken() {
         return verifiedBlog(blog.getId());
     }
 
+    @Transactional
     public Blog updateBlog(BlogRequestDto blogRequestDto) {
         Long userId = tokenService.getIdFromToken();
 
diff --git a/frontend/src/app/account/signup/page.tsx b/frontend/src/app/account/signup/page.tsx
index 805a8280..2ce37abb 100644
--- a/frontend/src/app/account/signup/page.tsx
+++ b/frontend/src/app/account/signup/page.tsx
@@ -82,6 +82,7 @@ export default function RegisterPage() {
         // requestDto 객체 생성
         const requestData = {
             roleId: 1, // 예시로 roleId가 1이라고 가정
+            username: username, // 닉네임
             email: fullEmail, // 생성된 이메일
             password: password, // 비밀번호
             phoneNumber: phoneNumber, // 전화번호
diff --git a/frontend/src/app/main/category/[slug]/page.tsx b/frontend/src/app/main/category/[slug]/page.tsx
index 08d61668..4b46e70a 100644
--- a/frontend/src/app/main/category/[slug]/page.tsx
+++ b/frontend/src/app/main/category/[slug]/page.tsx
@@ -100,7 +100,7 @@ const CategoryDetailPage = () => {
 
     // 페이지네이션 상태
     const [currentPage, setCurrentPage] = useState(1)
-    const booksPerPage = 8 // 한 페이지당 표시할 게시물 수
+    const booksPerPage = 5 // 한 페이지당 표시할 게시물 수
 
     // 카테고리에 따른 타이틀 설정
     const getCategoryTitle = () => {