diff --git a/Package.swift b/Package.swift
index 5fc29c0..fe421ee 100644
--- a/Package.swift
+++ b/Package.swift
@@ -5,7 +5,7 @@ import PackageDescription
 
 let package = Package(
   name: "UserDefaultsSnapshotLib",
-  platforms: [.iOS(.v12)],
+  platforms: [.iOS(.v13)],
   products: [
     // Products define the executables and libraries a package produces, and make them visible to other packages.
     .library(
diff --git a/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStore.swift b/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStore.swift
index 58ee545..3365090 100644
--- a/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStore.swift
+++ b/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStore.swift
@@ -55,11 +55,10 @@ open class UserDefaultsPersistentStore<Schema: UserDefaultsObject>: UserDefaults
     }
   }
 
-  public final func sinkSnapshot(_ sink: @escaping (UserDefaultsSnapshot<Schema>) -> Void) -> UserDefaultsPersistentStoreSinkCancellable {
+  public final func sinkSnapshot(_ sink: @escaping @Sendable (UserDefaultsSnapshot<Schema>) -> Void) -> UserDefaultsPersistentStoreSinkCancellable {
 
-    let token = UserDefaultsPersistentStoreSinkCancellable(owner: self)
-
-    initial: do {
+    // deliver initial
+    do {
       let snapshot = makeSnapshot()
 
       sink(
@@ -67,20 +66,51 @@ open class UserDefaultsPersistentStore<Schema: UserDefaultsObject>: UserDefaults
       )
     }
 
-    add { [weak self] in
+    return add { [weak self] in
       guard let self = self else { return }
 
       let snapshot = self.makeSnapshot()
 
-      DispatchQueue.main.async {
+      sink(
+        snapshot
+      )
+    }
+
+  }
+
+  public final func sinkSnapshotOnMain(_ sink: @escaping @MainActor (UserDefaultsSnapshot<Schema>) -> Void) -> UserDefaultsPersistentStoreSinkCancellable {
+
+    // deliver initial
+    do {
+      let snapshot = makeSnapshot()
+
+      if Thread.isMainThread {
+        MainActor.assumeIsolated {
+          sink(
+            snapshot
+          )
+        }
+      } else {
+        Task { @MainActor in
+          sink(
+            snapshot
+          )
+        }
+      }
+    }
+
+    return add { [weak self] in
+      guard let self = self else { return }
+
+      let snapshot = self.makeSnapshot()
+
+      Task { @MainActor in
         sink(
           snapshot
         )
       }
     }
 
-    return token
-
   }
 
 }
diff --git a/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStoreBase.swift b/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStoreBase.swift
index 778cddb..e86c13e 100644
--- a/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStoreBase.swift
+++ b/Sources/UserDefaultsSnapshotLib/UserDefaultsPersistentStoreBase.swift
@@ -16,7 +16,6 @@ open class UserDefaultsPersistentStoreBase: @unchecked Sendable {
 
   private let lock = NSLock()
 
-  @discardableResult
   public func add(_ eventReceiver: @escaping () -> Void) -> UserDefaultsPersistentStoreSinkCancellable {
     let token = UserDefaultsPersistentStoreSinkCancellable(owner: self)
     lock.lock()