diff --git a/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepository.java b/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepository.java
index 6b20ed0e..3d20b9f1 100644
--- a/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepository.java
+++ b/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepository.java
@@ -1,14 +1,10 @@
 package com.gongjakso.server.domain.portfolio.repository;
 
-import com.gongjakso.server.domain.member.entity.Member;
 import com.gongjakso.server.domain.portfolio.entity.Portfolio;
 import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
-import org.springframework.data.jpa.repository.Query;
-import org.springframework.data.repository.query.Param;
 
 public interface PortfolioRepository extends JpaRepository<Portfolio, Long>, PortfolioRepositoryCustom{
     Optional<Portfolio> findByIdAndDeletedAtIsNull(Long portfolioId);
     long countByDeletedAtIsNull();
-    Optional<Portfolio> findPortfolioById(Long portfolioId);
 }
diff --git a/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepositoryImpl.java b/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepositoryImpl.java
index f2bc6fa5..4fbb54c5 100644
--- a/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepositoryImpl.java
+++ b/src/main/java/com/gongjakso/server/domain/portfolio/repository/PortfolioRepositoryImpl.java
@@ -11,7 +11,7 @@
 import static com.gongjakso.server.domain.portfolio.entity.QPortfolio.portfolio;
 
 @RequiredArgsConstructor
-public class PortfolioRepositoryImpl {
+public class PortfolioRepositoryImpl implements PortfolioRepositoryCustom {
     private final JPAQueryFactory queryFactory;
 
     public List<Portfolio> findByMemberAndDeletedAtIsNull(Member member) {