diff --git a/src/main/java/com/codesdream/ase/model/parent/Parent.java b/src/main/java/com/codesdream/ase/model/parent/Parent.java
index 7fb7617..002a922 100644
--- a/src/main/java/com/codesdream/ase/model/parent/Parent.java
+++ b/src/main/java/com/codesdream/ase/model/parent/Parent.java
@@ -1,18 +1,15 @@
 package com.codesdream.ase.model.parent;
 
-import com.codesdream.ase.model.mark.Tag;
 import com.codesdream.ase.model.permission.User;
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 
-import javax.annotation.Generated;
-import javax.persistence.*;
-import java.util.List;
+import javax.persistence.Entity;
 
 @Entity
-@Table
 @Data
 @EqualsAndHashCode(callSuper = false)
 public class Parent extends User {
 
+    int studentId;
 }
diff --git a/src/main/java/com/codesdream/ase/model/student/Student.java b/src/main/java/com/codesdream/ase/model/student/Student.java
index 82329db..979e60c 100644
--- a/src/main/java/com/codesdream/ase/model/student/Student.java
+++ b/src/main/java/com/codesdream/ase/model/student/Student.java
@@ -13,6 +13,7 @@ import java.util.Map;
 @Data
 @EqualsAndHashCode(callSuper = false)
 public class Student extends User {
+    int parentId;
 
     String profilePicture;
 
diff --git a/src/main/java/com/codesdream/ase/repository/parent/ParentRepository.java b/src/main/java/com/codesdream/ase/repository/parent/ParentRepository.java
index 4560a04..83f2e1f 100644
--- a/src/main/java/com/codesdream/ase/repository/parent/ParentRepository.java
+++ b/src/main/java/com/codesdream/ase/repository/parent/ParentRepository.java
@@ -1,17 +1,15 @@
 package com.codesdream.ase.repository.parent;
 
 import com.codesdream.ase.model.parent.Parent;
-import com.codesdream.ase.model.student.Student;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
 import java.util.List;
-import java.util.Optional;
 
 @Repository
 public interface ParentRepository extends JpaRepository<Parent,Integer> {
-    List<Parent> findByStudentId(String studentId);
-    List<Parent> findByStudentId(String studentId, Sort sort);
+    List<Parent> findByStudentId(int studentId);
+    List<Parent> findByStudentId(int studentId, Sort sort);
 
 }
diff --git a/src/main/java/com/codesdream/ase/repository/student/StudentRepository.java b/src/main/java/com/codesdream/ase/repository/student/StudentRepository.java
index bcc9863..ca99a4a 100644
--- a/src/main/java/com/codesdream/ase/repository/student/StudentRepository.java
+++ b/src/main/java/com/codesdream/ase/repository/student/StudentRepository.java
@@ -1,18 +1,14 @@
 package com.codesdream.ase.repository.student;
 
 import com.codesdream.ase.model.student.Student;
-import com.codesdream.ase.model.student.StudentCourse;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 
-import java.util.List;
-import java.util.Optional;
-
 @Repository
 public interface StudentRepository extends JpaRepository<Student, Integer> {
 
-        Student findByParentId(String parentId);
-        Student findByParentId(String parentId, Sort sort);
+        Student findByParentId(int parentId);
+        Student findByParentId(int parentId, Sort sort);
 
 }