diff --git a/src/main/java/roomescape/payment/infrastructure/persistence/CanceledPaymentRepository.kt b/src/main/java/roomescape/payment/infrastructure/persistence/CanceledPaymentRepository.kt
index 9a004706..cb5d2e53 100644
--- a/src/main/java/roomescape/payment/infrastructure/persistence/CanceledPaymentRepository.kt
+++ b/src/main/java/roomescape/payment/infrastructure/persistence/CanceledPaymentRepository.kt
@@ -1,10 +1,8 @@
-package roomescape.payment.infrastructure.persistence;
+package roomescape.payment.infrastructure.persistence
 
-import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository
+import java.util.*
 
-import org.springframework.data.jpa.repository.JpaRepository;
-
-public interface CanceledPaymentRepository extends JpaRepository<CanceledPaymentEntity, Long> {
-
-	Optional<CanceledPaymentEntity> findByPaymentKey(String paymentKey);
+interface CanceledPaymentRepository : JpaRepository<CanceledPaymentEntity, Long> {
+    fun findByPaymentKey(paymentKey: String): Optional<CanceledPaymentEntity>
 }
diff --git a/src/main/java/roomescape/payment/infrastructure/persistence/PaymentRepository.kt b/src/main/java/roomescape/payment/infrastructure/persistence/PaymentRepository.kt
index 6cd4ea1f..c0ccd469 100644
--- a/src/main/java/roomescape/payment/infrastructure/persistence/PaymentRepository.kt
+++ b/src/main/java/roomescape/payment/infrastructure/persistence/PaymentRepository.kt
@@ -1,12 +1,10 @@
-package roomescape.payment.infrastructure.persistence;
+package roomescape.payment.infrastructure.persistence
 
-import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository
+import java.util.*
 
-import org.springframework.data.jpa.repository.JpaRepository;
+interface PaymentRepository : JpaRepository<PaymentEntity, Long> {
+    fun findByReservationId(reservationId: Long): Optional<PaymentEntity>
 
-public interface PaymentRepository extends JpaRepository<PaymentEntity, Long> {
-
-	Optional<PaymentEntity> findByReservationId(Long reservationId);
-
-	Optional<PaymentEntity> findByPaymentKey(String paymentKey);
+    fun findByPaymentKey(paymentKey: String): Optional<PaymentEntity>
 }