diff --git a/src/main/java/com/example/ReviewZIP/domain/user/UsersRepository.java b/src/main/java/com/example/ReviewZIP/domain/user/UsersRepository.java
index 19c134b..3412434 100644
--- a/src/main/java/com/example/ReviewZIP/domain/user/UsersRepository.java
+++ b/src/main/java/com/example/ReviewZIP/domain/user/UsersRepository.java
@@ -23,5 +23,5 @@ public interface UsersRepository extends JpaRepository<Users, Long> {
     boolean existsBySocial(String social);
     Optional<Users> findBySocial(String social);
 
-    Optional<Users> findByPhoneNum(String phoneNum);
+    List<Users> findByPhoneNum(String phoneNum);
 }
diff --git a/src/main/java/com/example/ReviewZIP/global/sms/SmsService.java b/src/main/java/com/example/ReviewZIP/global/sms/SmsService.java
index 484938f..1ba41a2 100644
--- a/src/main/java/com/example/ReviewZIP/global/sms/SmsService.java
+++ b/src/main/java/com/example/ReviewZIP/global/sms/SmsService.java
@@ -52,6 +52,8 @@ public void resetPassword(SmsDto.PasswordResetRequestDto requestDto) {
         }
         String encodedPassword = passwordEncoder.encode(requestDto.getPassword());
         Users user = usersRepository.findByPhoneNum(requestDto.getPhoneNum())
+                .stream()
+                .findFirst()
                 .orElseThrow(() -> new UsersHandler(ErrorStatus.USER_NOT_FOUND));
         user.setPassword(encodedPassword);
         usersRepository.save(user);