diff --git a/Projects/App/Sources/Feature/SignupFeature/Sources/AuthViewModel.swift b/Projects/App/Sources/Feature/SignupFeature/Sources/AuthViewModel.swift
index 6fd7ac3..c13cb96 100644
--- a/Projects/App/Sources/Feature/SignupFeature/Sources/AuthViewModel.swift
+++ b/Projects/App/Sources/Feature/SignupFeature/Sources/AuthViewModel.swift
@@ -93,53 +93,40 @@ public final class AuthViewModel: ObservableObject {
                     case 200:
                         let signInResponse = try result.map(SigninResponse.self)
 
-                        KeyChain.shared.saveTokenWithExpiration(
-                            key: Const.KeyChainKey.accessToken,
-                            token: signInResponse.accessToken,
-                            expiresIn: Double(signInResponse.accessTokenExpiresIn) ?? 3600
-                        )
-
-                        KeyChain.shared.saveTokenWithExpiration(
-                            key: Const.KeyChainKey.refreshToken,
-                            token: signInResponse.refreshToken,
-                            expiresIn: Double(signInResponse.refreshTokenExpiresIn) ?? 2592000
-                        )
+                        // 만료 시간을 현재로부터의 시간 대신 `Date(timeIntervalSince1970:)`으로 변환
+                        if let accessTokenExpiresIn = Double(signInResponse.accessTokenExpiresIn),
+                           let refreshTokenExpiresIn = Double(signInResponse.refreshTokenExpiresIn) {
+
+                            let accessTokenExpirationDate = Date(timeIntervalSince1970: accessTokenExpiresIn)
+                            let refreshTokenExpirationDate = Date(timeIntervalSince1970: refreshTokenExpiresIn)
+
+                            KeyChain.shared.saveTokenWithExpiration(
+                                key: Const.KeyChainKey.accessToken,
+                                token: signInResponse.accessToken,
+                                expiresIn: accessTokenExpirationDate.timeIntervalSinceNow
+                            )
+
+                            KeyChain.shared.saveTokenWithExpiration(
+                                key: Const.KeyChainKey.refreshToken,
+                                token: signInResponse.refreshToken,
+                                expiresIn: refreshTokenExpirationDate.timeIntervalSinceNow
+                            )
+
+                            // 만료 시간 확인을 위한 출력
+                            let dateFormatter = DateFormatter()
+                            dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
+                            dateFormatter.timeZone = TimeZone.current
+
+                            print("Access Token 만료 날짜: \(dateFormatter.string(from: accessTokenExpirationDate))")
+                            print("Refresh Token 만료 날짜: \(dateFormatter.string(from: refreshTokenExpirationDate))")
+                        } else {
+                            print("만료 시간 변환 오류: accessTokenExpiresIn 또는 refreshTokenExpiresIn이 Double로 변환되지 않음.")
+                        }
 
                         DispatchQueue.main.async {
                             completion(statusCode, signInResponse.accessToken, signInResponse.refreshToken)
                         }
 
-                        if let savedAccessToken = KeyChain.shared.read(key: Const.KeyChainKey.accessToken),
-                           let savedRefreshToken = KeyChain.shared.read(key: Const.KeyChainKey.refreshToken) {
-                            print("Access Token 저장됨: \(savedAccessToken)")
-                            print("Refresh Token 저장됨: \(savedRefreshToken)")
-
-                            if let accessTokenExpiresIn = Double(signInResponse.accessTokenExpiresIn),
-                               let refreshTokenExpiresIn = Double(signInResponse.refreshTokenExpiresIn) {
-
-                                let accessTokenExpirationDate = Date(timeIntervalSinceNow: accessTokenExpiresIn)
-                                let refreshTokenExpirationDate = Date(timeIntervalSinceNow: refreshTokenExpiresIn)
-
-                                let dateFormatter = DateFormatter()
-                                dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
-                                dateFormatter.timeZone = TimeZone.current
-
-                                print("Access Token 만료 날짜: \(dateFormatter.string(from: accessTokenExpirationDate))")
-                                print("Refresh Token 만료 날짜: \(dateFormatter.string(from: refreshTokenExpirationDate))")
-                            } else {
-                                print("만료 시간 변환 오류: accessTokenExpiresIn 또는 refreshTokenExpiresIn이 Double로 변환되지 않음.")
-                                print("accessTokenExpiresIn: \(signInResponse.accessTokenExpiresIn), refreshTokenExpiresIn: \(signInResponse.refreshTokenExpiresIn)")
-
-                                let defaultDate = Date()
-                                let dateFormatter = DateFormatter()
-                                dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
-                                dateFormatter.timeZone = TimeZone.current
-                                print("기본 만료 날짜 (현재 시간): \(dateFormatter.string(from: defaultDate))")
-                            }
-                        } else {
-                            print("토큰 저장 실패: Keychain에서 값을 읽어올 수 없습니다.")
-                        }
-
                     case 400:
                         print("400ㅣ비밀번호가 일치하지 않습니다.")
                         DispatchQueue.main.async {
@@ -187,6 +174,7 @@ public final class AuthViewModel: ObservableObject {
     }
 
 
+
     // MARK: - Sign Up
     func signUp(completion: @escaping (Bool) -> Void) {
             let params = SignupRequest(name: name, nickname: nickname, email: email, password: password, phoneNumber: phoneNumber)