diff --git a/src/main/java/classfit/example/classfit/auth/security/filter/CustomLoginFilter.java b/src/main/java/classfit/example/classfit/auth/security/filter/CustomLoginFilter.java
index 42c41e3d..c52a4ea9 100644
--- a/src/main/java/classfit/example/classfit/auth/security/filter/CustomLoginFilter.java
+++ b/src/main/java/classfit/example/classfit/auth/security/filter/CustomLoginFilter.java
@@ -52,7 +52,7 @@ protected void successfulAuthentication(HttpServletRequest req, HttpServletRespo
         CustomAuthenticationToken customAuth = (CustomAuthenticationToken) authResult;
         String role = customAuth.getAuthorities().iterator().next().getAuthority();
 
-        String accessToken = jwtUtil.createJwt(ACCESS_TOKEN_CATEGORY, customAuth.getEmail(), role, 1000 * 60 * 5L);
+        String accessToken = jwtUtil.createJwt(ACCESS_TOKEN_CATEGORY, customAuth.getEmail(), role, 1000 * 60 * 60 * 24 * 5L);
         String refreshToken = jwtUtil.createJwt(REFRESH_TOKEN_CATEGORY, customAuth.getEmail(), role, 1000 * 60 * 60 * 24 * 7L);
 
         redisUtil.setDataExpire(REFRESH_TOKEN_CATEGORY + ":" + customAuth.getEmail(), refreshToken, 60 * 60 * 24 * 7L);
diff --git a/src/main/java/classfit/example/classfit/classStudent/repository/ClassStudentRepository.java b/src/main/java/classfit/example/classfit/classStudent/repository/ClassStudentRepository.java
index a807721e..d8674318 100644
--- a/src/main/java/classfit/example/classfit/classStudent/repository/ClassStudentRepository.java
+++ b/src/main/java/classfit/example/classfit/classStudent/repository/ClassStudentRepository.java
@@ -4,7 +4,6 @@
 import classfit.example.classfit.classStudent.domain.ClassStudent;
 import classfit.example.classfit.scoreReport.dto.response.FindClassStudent;
 import classfit.example.classfit.student.domain.Student;
-import java.util.List;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
@@ -13,11 +12,13 @@
 import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
 
+import java.util.List;
+
 @Repository
 public interface ClassStudentRepository extends JpaRepository<ClassStudent, Long> {
 
     Page<ClassStudent> findBySubClass_MainClass_IdAndSubClass_Id(Long mainClassId, Long subClassId,
-            Pageable pageable);
+                                                                 Pageable pageable);
 
     @Modifying
     @Query("DELETE FROM ClassStudent cs WHERE cs.student.id = :studentId")
@@ -26,16 +27,16 @@ Page<ClassStudent> findBySubClass_MainClass_IdAndSubClass_Id(Long mainClassId, L
     @Query("SELECT s FROM ClassStudent s WHERE s.subClass.id = :subClassId")
     List<ClassStudent> findAllBySubClassId(@Param("subClassId") Long subClassId);
 
-    ClassStudent findByStudent(Student student);
+    List<ClassStudent> findByStudent(Student student);
 
     List<ClassStudent> findBySubClass(SubClass subClass);
 
     @Query("SELECT new classfit.example.classfit.scoreReport.dto.response.FindClassStudent(cs.student.id, cs.student.name) " +
-            "FROM ClassStudent cs " +
-            "WHERE cs.subClass.id = :subClassId " +
-            "AND cs.subClass.mainClass.id = :mainClassId")
+        "FROM ClassStudent cs " +
+        "WHERE cs.subClass.id = :subClassId " +
+        "AND cs.subClass.mainClass.id = :mainClassId")
     List<FindClassStudent> findStudentIdsByMainClassIdAndSubClassId(
-            @Param("mainClassId") Long mainClassId,
-            @Param("subClassId") Long subClassId);
+        @Param("mainClassId") Long mainClassId,
+        @Param("subClassId") Long subClassId);
 
 }
diff --git a/src/main/java/classfit/example/classfit/student/service/StudentService.java b/src/main/java/classfit/example/classfit/student/service/StudentService.java
index 4758abf2..46fd2be9 100644
--- a/src/main/java/classfit/example/classfit/student/service/StudentService.java
+++ b/src/main/java/classfit/example/classfit/student/service/StudentService.java
@@ -57,6 +57,29 @@ public StudentResponse registerStudent(StudentRequest request) {
         return StudentResponse.from(student);
     }
 
+    private void createAttendanceForThreeWeeks(Student student) {
+        LocalDate currentDate = LocalDate.now();
+        LocalDate weekStart = currentDate.with(DayOfWeek.MONDAY);
+        List<ClassStudent> classStudents = classStudentRepository.findByStudent(student);
+
+        classStudents.forEach(classStudent -> {
+            for (int i = 0; i < 3; i++) {
+                LocalDate weekDate = weekStart.plusWeeks(i);
+                for (int j = 0; j < 7; j++) {
+                    LocalDate attendanceDate = weekDate.plusDays(j);
+                    Attendance attendance = Attendance.builder()
+                        .date(attendanceDate)
+                        .week(j)
+                        .status(AttendanceStatus.PRESENT)
+                        .student(student)
+                        .classStudent(classStudent)
+                        .build();
+                    attendanceRepository.save(attendance);
+                }
+            }
+        });
+    }
+
     @Transactional
     public void deleteStudent(List<Long> studentIds) {
         studentIds.stream()
@@ -155,26 +178,4 @@ private void updateSubClasses(Student student, List<Long> subClassList) {
             classStudentRepository.save(classStudent);
         });
     }
-
-    private void createAttendanceForThreeWeeks(Student student) {
-        LocalDate currentDate = LocalDate.now();
-        LocalDate weekStart = currentDate.with(DayOfWeek.MONDAY);
-        ClassStudent classStudent = classStudentRepository.findByStudent(student);
-
-        // 3주간의 출결 생성 (현재 주 + 향후 2주)
-        for (int i = 0; i < 3; i++) {
-            LocalDate weekDate = weekStart.plusWeeks(i);
-            for (int j = 0; j < 7; j++) {
-                LocalDate attendanceDate = weekDate.plusDays(j);
-                Attendance attendance = Attendance.builder()
-                    .date(attendanceDate)
-                    .week(j)
-                    .status(AttendanceStatus.PRESENT)
-                    .student(student)
-                    .classStudent(classStudent)
-                    .build();
-                attendanceRepository.save(attendance);
-            }
-        }
-    }
 }
\ No newline at end of file