diff --git a/Sources/OversizeCalendarKit/CreateEventScreen/CreateEventViewModel.swift b/Sources/OversizeCalendarKit/CreateEventScreen/CreateEventViewModel.swift
index 63b7a37..89788f2 100644
--- a/Sources/OversizeCalendarKit/CreateEventScreen/CreateEventViewModel.swift
+++ b/Sources/OversizeCalendarKit/CreateEventScreen/CreateEventViewModel.swift
@@ -4,7 +4,7 @@
 //
 
 #if canImport(EventKit)
-    import EventKit
+@preconcurrency import EventKit
 #endif
 import Factory
 import OversizeCalendarService
@@ -14,13 +14,13 @@ import OversizeModels
 import SwiftUI
 
 #if !os(tvOS)
-    public enum CreateEventType: Equatable {
+public enum CreateEventType: Equatable, @unchecked Sendable {
         case new(Date?, calendar: EKCalendar?)
         case update(EKEvent)
     }
 
-    @MainActor
-    public class CreateEventViewModel: ObservableObject {
+
+public class CreateEventViewModel: ObservableObject, @unchecked Sendable {
         @Injected(\.calendarService) private var calendarService: CalendarService
         @Injected(\.locationService) private var locationService: LocationServiceProtocol
 
diff --git a/Sources/OversizeContactsKit/AttendeesList/AttendeesViewModel.swift b/Sources/OversizeContactsKit/AttendeesList/AttendeesViewModel.swift
index 0dfa02b..b529465 100644
--- a/Sources/OversizeContactsKit/AttendeesList/AttendeesViewModel.swift
+++ b/Sources/OversizeContactsKit/AttendeesList/AttendeesViewModel.swift
@@ -4,7 +4,7 @@
 //
 
 #if canImport(Contacts) && canImport(EventKit)
-    import Contacts
+@preconcurrency import Contacts
     import EventKit
 #endif
 import Factory
@@ -29,9 +29,9 @@ import SwiftUI
         func fetchData() async {
             state = .loading
             let _ = await contactsService.requestAccess()
-            do {
+          
                 let keys = [CNContactGivenNameKey, CNContactFamilyNameKey, CNContactEmailAddressesKey, CNContactThumbnailImageDataKey]
-                let result = try await contactsService.fetchContacts(keysToFetch: keys as [CNKeyDescriptor])
+                let result = await contactsService.fetchContacts(keysToFetch: keys as [CNKeyDescriptor])
                 switch result {
                 case let .success(data):
                     log("✅ CNContact fetched")
@@ -40,9 +40,7 @@ import SwiftUI
                     log("❌ CNContact not fetched (\(error.title))")
                     state = .error(error)
                 }
-            } catch {
-                state = .error(.custom(title: "Not contacts"))
-            }
+           
         }
 
         func getContactFromEmail(email: String, contacts: [CNContact]) -> CNContact? {
diff --git a/Sources/OversizeContactsKit/ContactsLists/ContactsListsViewModel.swift b/Sources/OversizeContactsKit/ContactsLists/ContactsListsViewModel.swift
index 8e7f414..c9ad11f 100644
--- a/Sources/OversizeContactsKit/ContactsLists/ContactsListsViewModel.swift
+++ b/Sources/OversizeContactsKit/ContactsLists/ContactsListsViewModel.swift
@@ -4,7 +4,7 @@
 //
 
 #if canImport(Contacts)
-    import Contacts
+@preconcurrency import Contacts
 #endif
 import Factory
 import OversizeContactsService
@@ -24,9 +24,9 @@ import SwiftUI
         func fetchData() async {
             state = .loading
             let _ = await contactsService.requestAccess()
-            do {
+
                 let keys = [CNContactGivenNameKey, CNContactFamilyNameKey, CNContactEmailAddressesKey, CNContactThumbnailImageDataKey]
-                let result = try await contactsService.fetchContacts(keysToFetch: keys as [CNKeyDescriptor])
+                let result = await contactsService.fetchContacts(keysToFetch: keys as [CNKeyDescriptor])
                 switch result {
                 case let .success(data):
                     log("✅ CNContact fetched")
@@ -35,9 +35,7 @@ import SwiftUI
                     log("❌ CNContact not fetched (\(error.title))")
                     state = .error(error)
                 }
-            } catch {
-                state = .error(.custom(title: "Not contacts"))
-            }
+
         }
 
         func getContactFromEmail(email: String, contacts: [CNContact]) -> CNContact? {
diff --git a/Sources/OversizeContactsKit/ContactsPicker/EmailPickerViewModel.swift b/Sources/OversizeContactsKit/ContactsPicker/EmailPickerViewModel.swift
index 2c47623..b43a1d3 100644
--- a/Sources/OversizeContactsKit/ContactsPicker/EmailPickerViewModel.swift
+++ b/Sources/OversizeContactsKit/ContactsPicker/EmailPickerViewModel.swift
@@ -4,7 +4,7 @@
 //
 
 #if canImport(Contacts)
-    import Contacts
+@preconcurrency import Contacts
 #endif
 import Factory
 import OversizeContactsService
@@ -26,9 +26,9 @@ import SwiftUI
             let status = await contactsService.requestAccess()
             switch status {
             case .success:
-                do {
+
                     let keys = [CNContactGivenNameKey, CNContactFamilyNameKey, CNContactEmailAddressesKey, CNContactThumbnailImageDataKey]
-                    let result = try await contactsService.fetchContacts(keysToFetch: keys as [CNKeyDescriptor])
+                    let result = await contactsService.fetchContacts(keysToFetch: keys as [CNKeyDescriptor])
                     switch result {
                     case let .success(data):
                         log("✅ CNContact fetched")
@@ -37,9 +37,7 @@ import SwiftUI
                         log("❌ CNContact not fetched (\(error.title))")
                         state = .error(error)
                     }
-                } catch {
-                    state = .error(.contacts(type: .unknown))
-                }
+            
             case let .failure(error):
                 state = .error(error)
             }
diff --git a/Sources/OversizeLocationKit/AddressPicker/AddressPickerViewModel.swift b/Sources/OversizeLocationKit/AddressPicker/AddressPickerViewModel.swift
index 0519299..cd32569 100644
--- a/Sources/OversizeLocationKit/AddressPicker/AddressPickerViewModel.swift
+++ b/Sources/OversizeLocationKit/AddressPicker/AddressPickerViewModel.swift
@@ -13,7 +13,7 @@ import SwiftUI
 
 #if !os(watchOS)
     @MainActor
-    class AddressPickerViewModel: NSObject, ObservableObject {
+class AddressPickerViewModel: NSObject, ObservableObject {
         @Injected(\.locationService) var locationService: LocationServiceProtocol
 
         @Published var locationResults: [MKLocalSearchCompletion] = .init()
@@ -60,7 +60,7 @@ import SwiftUI
         }
     }
 
-    extension AddressPickerViewModel: MKLocalSearchCompleterDelegate {
+extension AddressPickerViewModel: @preconcurrency MKLocalSearchCompleterDelegate {
         func completerDidUpdateResults(_ completer: MKLocalSearchCompleter) {
             currentPromise?(.success(completer.results))
         }
diff --git a/Sources/OversizeNotificationKit/Model/LocalNotificationAlertsTimes.swift b/Sources/OversizeNotificationKit/Model/LocalNotificationAlertsTimes.swift
index 227a8e9..3ace115 100644
--- a/Sources/OversizeNotificationKit/Model/LocalNotificationAlertsTimes.swift
+++ b/Sources/OversizeNotificationKit/Model/LocalNotificationAlertsTimes.swift
@@ -5,7 +5,7 @@
 
 import Foundation
 
-public enum LocalNotificationTime: CaseIterable, Equatable, Identifiable {
+public enum LocalNotificationTime: CaseIterable, Equatable, Identifiable, @unchecked Sendable {
     case oneMinuteBefore, fiveMinutesBefore, tenMinutesBefore, thirtyMinutesBefore, oneHourBefore, twoHoursBefore, oneDayBefore, twoDaysBefore, oneWeekBefore
 
     public var title: String {
@@ -58,5 +58,5 @@ public enum LocalNotificationTime: CaseIterable, Equatable, Identifiable {
         title
     }
 
-    public static var allCases: [LocalNotificationTime] = [.oneMinuteBefore, .fiveMinutesBefore, .tenMinutesBefore, .thirtyMinutesBefore, .oneHourBefore, .twoHoursBefore, .oneDayBefore, .twoDaysBefore, .oneWeekBefore]
+    public static let allCases: [LocalNotificationTime] = [.oneMinuteBefore, .fiveMinutesBefore, .tenMinutesBefore, .thirtyMinutesBefore, .oneHourBefore, .twoHoursBefore, .oneDayBefore, .twoDaysBefore, .oneWeekBefore]
 }