diff --git a/iOS-NOTTODO/iOS-NOTTODO/Presentation/Common/Calendar/CalendarView.swift b/iOS-NOTTODO/iOS-NOTTODO/Presentation/Common/Calendar/CalendarView.swift
index 026036ad..7b7c7daf 100644
--- a/iOS-NOTTODO/iOS-NOTTODO/Presentation/Common/Calendar/CalendarView.swift
+++ b/iOS-NOTTODO/iOS-NOTTODO/Presentation/Common/Calendar/CalendarView.swift
@@ -11,7 +11,7 @@ import FSCalendar
 import Then
 import SnapKit
 
-protocol CalendarViewDelegate {
+protocol CalendarViewDelegate: AnyObject {
     
     func todayBtnTapped()
 }
@@ -22,7 +22,7 @@ final class CalendarView: UIView {
     
     let today = Date()
     var monthCalendarClosure: ((_ month: String) -> Void)?
-    var delegate: CalendarViewDelegate?
+    weak var delegate: CalendarViewDelegate?
     
     // MARK: - UI Components
     
diff --git a/iOS-NOTTODO/iOS-NOTTODO/Presentation/Home/ViewControllers/HomeDataSource.swift b/iOS-NOTTODO/iOS-NOTTODO/Presentation/Home/ViewControllers/HomeDataSource.swift
index 4060b807..2b68d6ed 100644
--- a/iOS-NOTTODO/iOS-NOTTODO/Presentation/Home/ViewControllers/HomeDataSource.swift
+++ b/iOS-NOTTODO/iOS-NOTTODO/Presentation/Home/ViewControllers/HomeDataSource.swift
@@ -7,7 +7,7 @@
 
 import UIKit
 
-protocol HomeModalDelegate {
+protocol HomeModalDelegate: AnyObject {
     
     func updateMissionStatus(id: Int, status: CompletionStatus)
     func modifyMission(id: Int, type: MissionType)
@@ -37,7 +37,7 @@ final class HomeDataSource {
     private var missionList: [DailyMissionResponseDTO]
     
     var dataSource: DataSource?
-    var modalDelegate: HomeModalDelegate?
+    weak var modalDelegate: HomeModalDelegate?
     
     // MARK: - UI Components