diff --git a/Generator/Sources/NeedleFramework/Generating/Serializers/DependencyProviderSerializer.swift b/Generator/Sources/NeedleFramework/Generating/Serializers/DependencyProviderSerializer.swift
index eba992a3..e47845d0 100644
--- a/Generator/Sources/NeedleFramework/Generating/Serializers/DependencyProviderSerializer.swift
+++ b/Generator/Sources/NeedleFramework/Generating/Serializers/DependencyProviderSerializer.swift
@@ -35,6 +35,8 @@ class DependencyProviderFuncSerializer: Serializer {
     func serialize() -> String {
         return """
 /// \(provider.unprocessed.pathString)
+@preconcurrency
+@MainActor
 private func \(funcNameSerializer.serialize())(_ component: NeedleFoundation.Scope) -> AnyObject {
     return \(classNameSerializer.serialize())(\(paramsSerializer.serialize()))
 }\n
diff --git a/Generator/Sources/NeedleFramework/Generating/Serializers/OutputSerializer.swift b/Generator/Sources/NeedleFramework/Generating/Serializers/OutputSerializer.swift
index 023b16b7..6906c564 100644
--- a/Generator/Sources/NeedleFramework/Generating/Serializers/OutputSerializer.swift
+++ b/Generator/Sources/NeedleFramework/Generating/Serializers/OutputSerializer.swift
@@ -68,6 +68,8 @@ class OutputSerializer: Serializer {
     
         let traversalHelpers = (1...maxLevel).map { num in
             return """
+            @preconcurrency
+            @MainActor
             private func parent\(num)(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
                 return component\(String(repeating: ".parent", count: num))
             }
@@ -101,7 +103,10 @@ class OutputSerializer: Serializer {
                     .trimmingCharacters(in: .whitespacesAndNewlines)
                 let regNum = ($0 / linesPerHelper) + 1
                 registrationHelperFuncs.append("""
-                @inline(never) private func register\(regNum)() {
+                @inline(never)
+                @preconcurrency
+                @MainActor
+                private func register\(regNum)() {
                     \(helperBody)
                 }
                 """)
@@ -132,11 +137,15 @@ class OutputSerializer: Serializer {
         
         #endif
         
+        @preconcurrency
+        @MainActor
         private func factoryEmptyDependencyProvider(_ component: NeedleFoundation.Scope) -> AnyObject {
             return EmptyDependencyProvider(component: component)
         }
 
         // MARK: - Registration
+        @preconcurrency
+        @MainActor
         private func registerProviderFactory(_ componentPath: String, _ factory: @escaping (NeedleFoundation.Scope) -> AnyObject) {
             __DependencyProviderRegistry.instance.registerDependencyProviderFactory(for: componentPath, factory)
         }
@@ -146,6 +155,8 @@ class OutputSerializer: Serializer {
         \(registrationHelpers)
         #endif
         
+        @preconcurrency
+        @MainActor
         public func registerProviderFactories() {
         #if !NEEDLE_DYNAMIC
             \(registrationBody)
diff --git a/Generator/bin/needle b/Generator/bin/needle
index 9550c1c6..fb74886a 100755
Binary files a/Generator/bin/needle and b/Generator/bin/needle differ
diff --git a/Sample/MVC/TicTacToe/Sources/Game/GameComponent.swift b/Sample/MVC/TicTacToe/Sources/Game/GameComponent.swift
index bad0eaa5..1c045ce7 100644
--- a/Sample/MVC/TicTacToe/Sources/Game/GameComponent.swift
+++ b/Sample/MVC/TicTacToe/Sources/Game/GameComponent.swift
@@ -17,6 +17,7 @@
 import NeedleFoundation
 import UIKit
 
+@MainActor
 protocol GameDependency: Dependency {
     var mutableScoreStream: MutableScoreStream { get }
     var playersStream: PlayersStream { get }
@@ -40,6 +41,7 @@ class GameComponent: Component<GameDependency>, GameBuilder {
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows GameViewController to be initialized lazily.
+@MainActor
 protocol GameBuilder {
     var gameViewController: UIViewController { get }
 }
diff --git a/Sample/MVC/TicTacToe/Sources/Game/GameViewController.swift b/Sample/MVC/TicTacToe/Sources/Game/GameViewController.swift
index 233e5b93..8c4a3314 100644
--- a/Sample/MVC/TicTacToe/Sources/Game/GameViewController.swift
+++ b/Sample/MVC/TicTacToe/Sources/Game/GameViewController.swift
@@ -21,7 +21,7 @@ import UIKit
 private let rowCount = 3
 private let colCount = 3
 private let sectionCount = 1
-private let cellSize: CGFloat = UIScreen.main.bounds.width / CGFloat(colCount)
+@MainActor let cellSize: CGFloat = UIScreen.main.bounds.width / CGFloat(colCount)
 private let cellIdentifier = "TicTacToeCell"
 
 private enum Players: Int {
diff --git a/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift b/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift
index 84ce32c2..d279e8b0 100644
--- a/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift
+++ b/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift
@@ -42,6 +42,7 @@ class LoggedInComponent: Component<LoggedInDependency>, LoggedInBuilder {
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows LoggedInViewController to be initialized lazily.
+@MainActor
 protocol LoggedInBuilder {
     var loggedInViewController: UIViewController { get }
 }
diff --git a/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInViewController.swift b/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInViewController.swift
index 803f8d4f..7f0ff6d8 100644
--- a/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInViewController.swift
+++ b/Sample/MVC/TicTacToe/Sources/LoggedIn/LoggedInViewController.swift
@@ -97,10 +97,8 @@ class LoggedInViewController: UIViewController, ScoreSheetListener {
     }
 
     func done() {
-        dismiss(animated: true)
-    }
-
-    deinit {
-        gameDisposable?.dispose()
+        dismiss(animated: true) { [weak self] in
+            self?.gameDisposable?.dispose()
+        }
     }
 }
diff --git a/Sample/MVC/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift b/Sample/MVC/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift
index 0db7b36a..af789f81 100644
--- a/Sample/MVC/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift
+++ b/Sample/MVC/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift
@@ -17,6 +17,7 @@
 import NeedleFoundation
 import UIKit
 
+@MainActor
 protocol LoggedOutDependency: Dependency {
     var mutablePlayersStream: MutablePlayersStream { get }
 }
@@ -30,6 +31,7 @@ class LoggedOutComponent: Component<LoggedOutDependency>, LoggedOutBuilder {
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows LoggedOutViewController to be initialized lazily.
+@MainActor
 protocol LoggedOutBuilder {
     var loggedOutViewController: UIViewController { get }
 }
diff --git a/Sample/MVC/TicTacToe/Sources/NeedleGenerated.swift b/Sample/MVC/TicTacToe/Sources/NeedleGenerated.swift
index 09c9b730..b93b5803 100644
--- a/Sample/MVC/TicTacToe/Sources/NeedleGenerated.swift
+++ b/Sample/MVC/TicTacToe/Sources/NeedleGenerated.swift
@@ -23,10 +23,14 @@ private let needleDependenciesHash : String? = nil
 
 // MARK: - Traversal Helpers
 
+@preconcurrency
+@MainActor
 private func parent1(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
     return component.parent
 }
 
+@preconcurrency
+@MainActor
 private func parent2(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
     return component.parent.parent
 }
@@ -50,6 +54,8 @@ private class GameDependency1ab5926a977f706d3195Provider: GameDependency {
     }
 }
 /// ^->RootComponent->LoggedInComponent->GameComponent
+@preconcurrency
+@MainActor
 private func factorycf9c02c4def4e3d508816cd03d3cf415b70dfb0e(_ component: NeedleFoundation.Scope) -> AnyObject {
     return GameDependency1ab5926a977f706d3195Provider(loggedInComponent: parent1(component) as! LoggedInComponent, rootComponent: parent2(component) as! RootComponent)
 }
@@ -63,10 +69,14 @@ private class ScoreSheetDependency97f2595a691a56781aaaProvider: ScoreSheetDepend
     }
 }
 /// ^->RootComponent->LoggedInComponent->GameComponent->ScoreSheetComponent
+@preconcurrency
+@MainActor
 private func factory3f7d60e2119708f293bac0d8c882e1e0d9b5eda1(_ component: NeedleFoundation.Scope) -> AnyObject {
     return ScoreSheetDependency97f2595a691a56781aaaProvider(loggedInComponent: parent2(component) as! LoggedInComponent)
 }
 /// ^->RootComponent->LoggedInComponent->ScoreSheetComponent
+@preconcurrency
+@MainActor
 private func factory3f7d60e2119708f293ba0b20504d5a9e5588d7b3(_ component: NeedleFoundation.Scope) -> AnyObject {
     return ScoreSheetDependency97f2595a691a56781aaaProvider(loggedInComponent: parent1(component) as! LoggedInComponent)
 }
@@ -80,6 +90,8 @@ private class LoggedOutDependencyacada53ea78d270efa2fProvider: LoggedOutDependen
     }
 }
 /// ^->RootComponent->LoggedOutComponent
+@preconcurrency
+@MainActor
 private func factory1434ff4463106e5c4f1bb3a8f24c1d289f2c0f2e(_ component: NeedleFoundation.Scope) -> AnyObject {
     return LoggedOutDependencyacada53ea78d270efa2fProvider(rootComponent: parent1(component) as! RootComponent)
 }
@@ -105,31 +117,39 @@ extension LoggedOutComponent: Registration {
 extension LoggedInComponent: Registration {
     public func registerItems() {
 
-
+        localTable["scoreStream-ScoreStream"] = { [unowned self] in self.scoreStream as Any }
     }
 }
 extension RootComponent: Registration {
     public func registerItems() {
 
-
+        localTable["playersStream-PlayersStream"] = { [unowned self] in self.playersStream as Any }
+        localTable["mutablePlayersStream-MutablePlayersStream"] = { [unowned self] in self.mutablePlayersStream as Any }
     }
 }
 
 
 #endif
 
+@preconcurrency
+@MainActor
 private func factoryEmptyDependencyProvider(_ component: NeedleFoundation.Scope) -> AnyObject {
     return EmptyDependencyProvider(component: component)
 }
 
 // MARK: - Registration
+@preconcurrency
+@MainActor
 private func registerProviderFactory(_ componentPath: String, _ factory: @escaping (NeedleFoundation.Scope) -> AnyObject) {
     __DependencyProviderRegistry.instance.registerDependencyProviderFactory(for: componentPath, factory)
 }
 
 #if !NEEDLE_DYNAMIC
 
-@inline(never) private func register1() {
+@inline(never)
+@preconcurrency
+@MainActor
+private func register1() {
     registerProviderFactory("^->RootComponent->LoggedInComponent->GameComponent", factorycf9c02c4def4e3d508816cd03d3cf415b70dfb0e)
     registerProviderFactory("^->RootComponent->LoggedInComponent->GameComponent->ScoreSheetComponent", factory3f7d60e2119708f293bac0d8c882e1e0d9b5eda1)
     registerProviderFactory("^->RootComponent->LoggedInComponent->ScoreSheetComponent", factory3f7d60e2119708f293ba0b20504d5a9e5588d7b3)
@@ -139,6 +159,8 @@ private func registerProviderFactory(_ componentPath: String, _ factory: @escapi
 }
 #endif
 
+@preconcurrency
+@MainActor
 public func registerProviderFactories() {
 #if !NEEDLE_DYNAMIC
     register1()
diff --git a/Sample/MVC/TicTacToe/Sources/Root/RootViewController.swift b/Sample/MVC/TicTacToe/Sources/Root/RootViewController.swift
index b58342e0..1f86d26a 100644
--- a/Sample/MVC/TicTacToe/Sources/Root/RootViewController.swift
+++ b/Sample/MVC/TicTacToe/Sources/Root/RootViewController.swift
@@ -52,6 +52,11 @@ class RootViewController: UIViewController {
         updateChildViewController()
     }
 
+    override func viewDidDisappear(_ animated: Bool) {
+        super.viewDidDisappear(animated)
+        playersStreamDisposable?.dispose()
+    }
+
     private func updateChildViewController() {
         if playersStreamDisposable != nil {
             return
@@ -89,8 +94,4 @@ class RootViewController: UIViewController {
             present(viewController, animated: true, completion: nil)
         }
     }
-
-    deinit {
-        playersStreamDisposable?.dispose()
-    }
 }
diff --git a/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift b/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift
index ec706a8e..c1565b78 100644
--- a/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift
+++ b/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift
@@ -18,6 +18,7 @@ import NeedleFoundation
 import RxSwift
 import UIKit
 
+@MainActor
 protocol ScoreSheetDependency: Dependency {
     var scoreStream: ScoreStream { get }
 }
@@ -30,6 +31,7 @@ class ScoreSheetComponent: Component<ScoreSheetDependency>, ScoreSheetBuilder {
 }
 
 // Use a builder protocol to allow mocking for unit tests
+@MainActor
 protocol ScoreSheetBuilder {
     var scoreSheetViewController: UIViewController { get }
 }
diff --git a/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetViewController.swift b/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetViewController.swift
index 0f246503..d4293720 100644
--- a/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetViewController.swift
+++ b/Sample/MVC/TicTacToe/Sources/ScoreSheet/ScoreSheetViewController.swift
@@ -19,6 +19,7 @@ import RxSwift
 import SnapKit
 import UIKit
 
+@MainActor
 protocol ScoreSheetListener {
     func done()
 }
diff --git a/Sample/MVC/TicTacToe/Tests/RootViewControllerTests.swift b/Sample/MVC/TicTacToe/Tests/RootViewControllerTests.swift
index 4bb5dfea..60a92cd4 100644
--- a/Sample/MVC/TicTacToe/Tests/RootViewControllerTests.swift
+++ b/Sample/MVC/TicTacToe/Tests/RootViewControllerTests.swift
@@ -18,6 +18,7 @@
 import RxSwift
 import XCTest
 
+@MainActor
 class RootViewControllerTests: XCTestCase {
 
     private var playersStream: PlayersStreamMock!
diff --git a/Sample/MVC/TicTacToe/TicTacToe.xcodeproj/project.pbxproj b/Sample/MVC/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
index 1999a8df..5c04d30b 100644
--- a/Sample/MVC/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
+++ b/Sample/MVC/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 52;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -567,6 +567,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.uber.needle.tictactoe.TicTacToe;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
@@ -587,6 +588,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.uber.needle.tictactoe.TicTacToe;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
diff --git a/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetComponent.swift b/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetComponent.swift
index 50460948..a554ee83 100644
--- a/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetComponent.swift
+++ b/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetComponent.swift
@@ -18,6 +18,7 @@ import NeedleFoundation
 import RxSwift
 import UIKit
 
+@MainActor
 public protocol ScoreSheetDependency: Dependency {
     var scoreStream: ScoreStream { get }
 }
@@ -30,6 +31,7 @@ public class ScoreSheetComponent: Component<ScoreSheetDependency>, ScoreSheetBui
 }
 
 // Use a builder protocol to allow mocking for unit tests
+@MainActor
 public protocol ScoreSheetBuilder {
     var scoreSheetViewController: UIViewController { get }
 }
diff --git a/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetViewController.swift b/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetViewController.swift
index 9e01811d..22ebc2b5 100644
--- a/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetViewController.swift
+++ b/Sample/Pluginized/TicTacToe/ScoreSheet/ScoreSheetViewController.swift
@@ -19,6 +19,7 @@ import RxSwift
 import SnapKit
 import UIKit
 
+@MainActor
 public protocol ScoreSheetListener {
     func done()
 }
diff --git a/Sample/Pluginized/TicTacToe/TicTacToe.xcodeproj/project.pbxproj b/Sample/Pluginized/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
index be3c7288..abf7368f 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
+++ b/Sample/Pluginized/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 52;
+	objectVersion = 54;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -987,6 +987,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_STRICT_CONCURRENCY = complete;
 			};
 			name = Debug;
 		};
@@ -1041,6 +1042,7 @@
 				SDKROOT = iphoneos;
 				SWIFT_COMPILATION_MODE = wholemodule;
 				SWIFT_OPTIMIZATION_LEVEL = "-O";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				VALIDATE_PRODUCT = YES;
 			};
 			name = Release;
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameComponent.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameComponent.swift
index c1370cef..13eae8a3 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameComponent.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameComponent.swift
@@ -19,11 +19,13 @@ import ScoreSheet
 import TicTacToeIntegrations
 import UIKit
 
+@MainActor
 protocol GameDependency: Dependency {
     var mutableScoreStream: MutableScoreStream { get }
     var playersStream: PlayersStream { get }
 }
 
+@MainActor
 protocol GamePluginExtension: PluginExtension {
     var scoreSheetBuilder: ScoreSheetBuilder { get }
 }
@@ -62,6 +64,7 @@ class GameComponent: UberPluginizedComponent<GameDependency, GamePluginExtension
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows GameViewController to be initialized lazily.
+@MainActor
 protocol GameBuilder {
     var gameViewController: UIViewController { get }
 }
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameViewController.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameViewController.swift
index 905da340..4a0fa2a0 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameViewController.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/Game/GameViewController.swift
@@ -22,7 +22,7 @@ import UIKit
 private let rowCount = 3
 private let colCount = 3
 private let sectionCount = 1
-private let cellSize: CGFloat = UIScreen.main.bounds.width / CGFloat(colCount)
+@MainActor private let cellSize: CGFloat = UIScreen.main.bounds.width / CGFloat(colCount)
 private let cellIdentifier = "TicTacToeCell"
 
 private enum Players: Int {
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInComponent.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInComponent.swift
index 3bb8a246..59131b5f 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInComponent.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInComponent.swift
@@ -19,6 +19,7 @@ import ScoreSheet
 import TicTacToeIntegrations
 import UIKit
 
+@MainActor
 protocol LoggedInPluginExtension: PluginExtension {
     var scoreSheetBuilder: ScoreSheetBuilder { get }
     var mutableScoreStream: MutableScoreStream { get }
@@ -50,6 +51,7 @@ class LoggedInComponent: PluginizedComponent<EmptyDependency, LoggedInPluginExte
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows LoggedInViewController to be initialized lazily.
+@MainActor
 protocol LoggedInBuilder {
     var loggedInViewController: UIViewController { get }
 }
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInViewController.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInViewController.swift
index edbe8943..391c9723 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInViewController.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedIn/LoggedInViewController.swift
@@ -98,10 +98,8 @@ class LoggedInViewController: ObservableViewController, ScoreSheetListener {
     }
 
     func done() {
-        dismiss(animated: true)
-    }
-
-    deinit {
-        gameDisposable?.dispose()
+        dismiss(animated: true) { [weak self] in
+            self?.gameDisposable?.dispose()
+        }
     }
 }
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedOut/LoggedOutComponent.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedOut/LoggedOutComponent.swift
index 0db7b36a..af789f81 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedOut/LoggedOutComponent.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/LoggedOut/LoggedOutComponent.swift
@@ -17,6 +17,7 @@
 import NeedleFoundation
 import UIKit
 
+@MainActor
 protocol LoggedOutDependency: Dependency {
     var mutablePlayersStream: MutablePlayersStream { get }
 }
@@ -30,6 +31,7 @@ class LoggedOutComponent: Component<LoggedOutDependency>, LoggedOutBuilder {
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows LoggedOutViewController to be initialized lazily.
+@MainActor
 protocol LoggedOutBuilder {
     var loggedOutViewController: UIViewController { get }
 }
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/NeedleGenerated.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/NeedleGenerated.swift
index 0d09033b..0a513fb7 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/NeedleGenerated.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/NeedleGenerated.swift
@@ -21,18 +21,24 @@ import TicTacToeIntegrations
 import UIKit
 
 // swiftlint:disable unused_declaration
-private let needleDependenciesHash : String? = "4b585865bab35437b0cbc60e9d74b1b1"
+private let needleDependenciesHash : String? = "7d206250bd06106f1c31c7f537788c58"
 
 // MARK: - Traversal Helpers
 
+@preconcurrency
+@MainActor
 private func parent1(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
     return component.parent
 }
 
+@preconcurrency
+@MainActor
 private func parent2(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
     return component.parent.parent
 }
 
+@preconcurrency
+@MainActor
 private func parent3(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
     return component.parent.parent.parent
 }
@@ -51,6 +57,8 @@ private class LoggedOutDependencyacada53ea78d270efa2fProvider: LoggedOutDependen
     }
 }
 /// ^->RootComponent->LoggedOutComponent
+@preconcurrency
+@MainActor
 private func factory1434ff4463106e5c4f1bb3a8f24c1d289f2c0f2e(_ component: NeedleFoundation.Scope) -> AnyObject {
     return LoggedOutDependencyacada53ea78d270efa2fProvider(rootComponent: parent1(component) as! RootComponent)
 }
@@ -64,6 +72,8 @@ private class ScoreSheetDependencyea879b8e06763171478bProvider: ScoreSheetDepend
     }
 }
 /// ^->RootComponent->LoggedInComponent->GameComponent->GameNonCoreComponent->ScoreSheetComponent
+@preconcurrency
+@MainActor
 private func factoryb11b7d1dec7e3c9b3dca49b41e44e0ed6a6f8eaf(_ component: NeedleFoundation.Scope) -> AnyObject {
     return ScoreSheetDependencyea879b8e06763171478bProvider(loggedInComponent: parent3(component) as! LoggedInComponent)
 }
@@ -77,6 +87,8 @@ private class ScoreSheetDependency6fb80fa6e1ee31d9ba11Provider: ScoreSheetDepend
     }
 }
 /// ^->RootComponent->LoggedInComponent->LoggedInNonCoreComponent->ScoreSheetComponent
+@preconcurrency
+@MainActor
 private func factory3306c50e89e2421d0b0c65d055996113f3c13de1(_ component: NeedleFoundation.Scope) -> AnyObject {
     return ScoreSheetDependency6fb80fa6e1ee31d9ba11Provider(loggedInNonCoreComponent: parent1(component) as! LoggedInNonCoreComponent)
 }
@@ -95,6 +107,8 @@ private class GameDependency1ab5926a977f706d3195Provider: GameDependency {
     }
 }
 /// ^->RootComponent->LoggedInComponent->GameComponent
+@preconcurrency
+@MainActor
 private func factorycf9c02c4def4e3d508816cd03d3cf415b70dfb0e(_ component: NeedleFoundation.Scope) -> AnyObject {
     return GameDependency1ab5926a977f706d3195Provider(loggedInComponent: parent1(component) as! LoggedInComponent, rootComponent: parent2(component) as! RootComponent)
 }
@@ -133,7 +147,8 @@ extension LoggedOutComponent: Registration {
 extension RootComponent: Registration {
     public func registerItems() {
 
-
+        localTable["playersStream-PlayersStream"] = { [unowned self] in self.playersStream as Any }
+        localTable["mutablePlayersStream-MutablePlayersStream"] = { [unowned self] in self.mutablePlayersStream as Any }
     }
 }
 extension ScoreSheetComponent: Registration {
@@ -144,15 +159,15 @@ extension ScoreSheetComponent: Registration {
 extension GameNonCoreComponent: Registration {
     public func registerItems() {
 
-        localTable["scoreSheetBuilder-ScoreSheetBuilder"] = { self.scoreSheetBuilder as Any }
+        localTable["scoreSheetBuilder-ScoreSheetBuilder"] = { [unowned self] in self.scoreSheetBuilder as Any }
     }
 }
 extension LoggedInNonCoreComponent: Registration {
     public func registerItems() {
 
-        localTable["scoreSheetBuilder-ScoreSheetBuilder"] = { self.scoreSheetBuilder as Any }
-        localTable["mutableScoreStream-MutableScoreStream"] = { self.mutableScoreStream as Any }
-        localTable["scoreStream-ScoreStream"] = { self.scoreStream as Any }
+        localTable["scoreSheetBuilder-ScoreSheetBuilder"] = { [unowned self] in self.scoreSheetBuilder as Any }
+        localTable["mutableScoreStream-MutableScoreStream"] = { [unowned self] in self.mutableScoreStream as Any }
+        localTable["scoreStream-ScoreStream"] = { [unowned self] in self.scoreStream as Any }
     }
 }
 extension GameComponent: Registration {
@@ -185,18 +200,25 @@ extension LoggedInComponent: ExtensionRegistration {
 
 #endif
 
+@preconcurrency
+@MainActor
 private func factoryEmptyDependencyProvider(_ component: NeedleFoundation.Scope) -> AnyObject {
     return EmptyDependencyProvider(component: component)
 }
 
 // MARK: - Registration
+@preconcurrency
+@MainActor
 private func registerProviderFactory(_ componentPath: String, _ factory: @escaping (NeedleFoundation.Scope) -> AnyObject) {
     __DependencyProviderRegistry.instance.registerDependencyProviderFactory(for: componentPath, factory)
 }
 
 #if !NEEDLE_DYNAMIC
 
-@inline(never) private func register1() {
+@inline(never)
+@preconcurrency
+@MainActor
+private func register1() {
     registerProviderFactory("^->RootComponent->LoggedOutComponent", factory1434ff4463106e5c4f1bb3a8f24c1d289f2c0f2e)
     registerProviderFactory("^->RootComponent", factoryEmptyDependencyProvider)
     registerProviderFactory("^->RootComponent->LoggedInComponent->GameComponent->GameNonCoreComponent->ScoreSheetComponent", factoryb11b7d1dec7e3c9b3dca49b41e44e0ed6a6f8eaf)
@@ -214,6 +236,8 @@ private func registerProviderFactory(_ componentPath: String, _ factory: @escapi
 }
 #endif
 
+@preconcurrency
+@MainActor
 public func registerProviderFactories() {
 #if !NEEDLE_DYNAMIC
     register1()
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/ObservableViewController.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/ObservableViewController.swift
index 4025ac6b..3db4c603 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/ObservableViewController.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/ObservableViewController.swift
@@ -21,7 +21,6 @@ import UIKit
 enum ViewControllerLifecycle {
     case viewDidAppear
     case viewDidDisappear
-    case `deinit`
 }
 
 /// A view controller whose lifecycle events can be observed via Rx.
@@ -47,8 +46,4 @@ class ObservableViewController: UIViewController {
     // MARK: - Private
 
     private let lifecycleSubject = ReplaySubject<ViewControllerLifecycle>.create(bufferSize: 1)
-
-    deinit {
-        lifecycleSubject.onNext(.deinit)
-    }
 }
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/PluginizedScopeLifecycle.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/PluginizedScopeLifecycle.swift
index 734e1cc1..be5d10dd 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/PluginizedScopeLifecycle.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/PluginizedScopeLifecycle.swift
@@ -25,8 +25,6 @@ extension ObservableViewController: PluginizedScopeLifecycleObservable {
         let disposable = lifecycle
             .subscribe(onNext: { (event: ViewControllerLifecycle) in
                 switch event {
-                case .deinit:
-                    observer(.deinit)
                 case .viewDidAppear:
                     observer(.active)
                 case .viewDidDisappear:
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCore/Root/RootViewController.swift b/Sample/Pluginized/TicTacToe/TicTacToeCore/Root/RootViewController.swift
index b58342e0..1f86d26a 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCore/Root/RootViewController.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCore/Root/RootViewController.swift
@@ -52,6 +52,11 @@ class RootViewController: UIViewController {
         updateChildViewController()
     }
 
+    override func viewDidDisappear(_ animated: Bool) {
+        super.viewDidDisappear(animated)
+        playersStreamDisposable?.dispose()
+    }
+
     private func updateChildViewController() {
         if playersStreamDisposable != nil {
             return
@@ -89,8 +94,4 @@ class RootViewController: UIViewController {
             present(viewController, animated: true, completion: nil)
         }
     }
-
-    deinit {
-        playersStreamDisposable?.dispose()
-    }
 }
diff --git a/Sample/Pluginized/TicTacToe/TicTacToeCoreTests/RootViewControllerTests.swift b/Sample/Pluginized/TicTacToe/TicTacToeCoreTests/RootViewControllerTests.swift
index 4bb5dfea..60a92cd4 100644
--- a/Sample/Pluginized/TicTacToe/TicTacToeCoreTests/RootViewControllerTests.swift
+++ b/Sample/Pluginized/TicTacToe/TicTacToeCoreTests/RootViewControllerTests.swift
@@ -18,6 +18,7 @@
 import RxSwift
 import XCTest
 
+@MainActor
 class RootViewControllerTests: XCTestCase {
 
     private var playersStream: PlayersStreamMock!
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/Sources/Game/GameComponent.swift b/Sample/SwiftUI-MVVM/TicTacToe/Sources/Game/GameComponent.swift
index 33401fa5..80b8eebe 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/Sources/Game/GameComponent.swift
+++ b/Sample/SwiftUI-MVVM/TicTacToe/Sources/Game/GameComponent.swift
@@ -17,6 +17,7 @@
 import NeedleFoundation
 import SwiftUI
 
+@MainActor
 protocol GameDependency: Dependency {
     var mutableScoreStream: MutableScoreStream { get }
     var playersStream: PlayersStream { get }
@@ -52,6 +53,7 @@ class GameComponent: Component<GameDependency>, GameBuilder {
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows GameView to be initialized lazily.
+@MainActor
 protocol GameBuilder {
     var gameView: AnyView { get }
 }
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift b/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift
index f54653f7..cb361b56 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift
+++ b/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedIn/LoggedInComponent.swift
@@ -52,6 +52,7 @@ class LoggedInComponent: Component<LoggedInDependency>, LoggedInBuilder {
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows LoggedInView to be initialized lazily.
+@MainActor
 protocol LoggedInBuilder {
     var loggedInView: AnyView { get }
 }
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift b/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift
index 1381638b..3a772955 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift
+++ b/Sample/SwiftUI-MVVM/TicTacToe/Sources/LoggedOut/LoggedOutComponent.swift
@@ -17,6 +17,7 @@
 import NeedleFoundation
 import SwiftUI
 
+@MainActor
 protocol LoggedOutDependency: Dependency {
     var mutablePlayersStream: MutablePlayersStream { get }
 }
@@ -28,7 +29,7 @@ class LoggedOutComponent: Component<LoggedOutDependency>, LoggedOutBuilder {
             mutablePlayersStream: dependency.mutablePlayersStream
         )
     }
-    
+
     var loggedOutView: AnyView {
         return AnyView(
             LoggedOutView(viewModel: loggedOutViewModel)
@@ -38,6 +39,7 @@ class LoggedOutComponent: Component<LoggedOutDependency>, LoggedOutBuilder {
 
 // Use a builder protocol to allow mocking for unit tests. At the same time,
 // this allows LoggedOutView to be initialized lazily.
+@MainActor
 protocol LoggedOutBuilder {
     var loggedOutView: AnyView { get }
 }
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/Sources/NeedleGenerated.swift b/Sample/SwiftUI-MVVM/TicTacToe/Sources/NeedleGenerated.swift
index 34ea7652..b542f5b5 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/Sources/NeedleGenerated.swift
+++ b/Sample/SwiftUI-MVVM/TicTacToe/Sources/NeedleGenerated.swift
@@ -22,10 +22,14 @@ private let needleDependenciesHash : String? = nil
 
 // MARK: - Traversal Helpers
 
+@preconcurrency
+@MainActor
 private func parent1(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
     return component.parent
 }
 
+@preconcurrency
+@MainActor
 private func parent2(_ component: NeedleFoundation.Scope) -> NeedleFoundation.Scope {
     return component.parent.parent
 }
@@ -49,6 +53,8 @@ private class GameDependency1ab5926a977f706d3195Provider: GameDependency {
     }
 }
 /// ^->RootComponent->LoggedInComponent->GameComponent
+@preconcurrency
+@MainActor
 private func factorycf9c02c4def4e3d508816cd03d3cf415b70dfb0e(_ component: NeedleFoundation.Scope) -> AnyObject {
     return GameDependency1ab5926a977f706d3195Provider(loggedInComponent: parent1(component) as! LoggedInComponent, rootComponent: parent2(component) as! RootComponent)
 }
@@ -62,10 +68,14 @@ private class ScoreSheetDependency97f2595a691a56781aaaProvider: ScoreSheetDepend
     }
 }
 /// ^->RootComponent->LoggedInComponent->GameComponent->ScoreSheetComponent
+@preconcurrency
+@MainActor
 private func factory3f7d60e2119708f293bac0d8c882e1e0d9b5eda1(_ component: NeedleFoundation.Scope) -> AnyObject {
     return ScoreSheetDependency97f2595a691a56781aaaProvider(loggedInComponent: parent2(component) as! LoggedInComponent)
 }
 /// ^->RootComponent->LoggedInComponent->ScoreSheetComponent
+@preconcurrency
+@MainActor
 private func factory3f7d60e2119708f293ba0b20504d5a9e5588d7b3(_ component: NeedleFoundation.Scope) -> AnyObject {
     return ScoreSheetDependency97f2595a691a56781aaaProvider(loggedInComponent: parent1(component) as! LoggedInComponent)
 }
@@ -79,6 +89,8 @@ private class LoggedOutDependencyacada53ea78d270efa2fProvider: LoggedOutDependen
     }
 }
 /// ^->RootComponent->LoggedOutComponent
+@preconcurrency
+@MainActor
 private func factory1434ff4463106e5c4f1bb3a8f24c1d289f2c0f2e(_ component: NeedleFoundation.Scope) -> AnyObject {
     return LoggedOutDependencyacada53ea78d270efa2fProvider(rootComponent: parent1(component) as! RootComponent)
 }
@@ -104,31 +116,39 @@ extension LoggedOutComponent: Registration {
 extension LoggedInComponent: Registration {
     public func registerItems() {
 
-
+        localTable["scoreStream-ScoreStream"] = { [unowned self] in self.scoreStream as Any }
     }
 }
 extension RootComponent: Registration {
     public func registerItems() {
 
-
+        localTable["playersStream-PlayersStream"] = { [unowned self] in self.playersStream as Any }
+        localTable["mutablePlayersStream-MutablePlayersStream"] = { [unowned self] in self.mutablePlayersStream as Any }
     }
 }
 
 
 #endif
 
+@preconcurrency
+@MainActor
 private func factoryEmptyDependencyProvider(_ component: NeedleFoundation.Scope) -> AnyObject {
     return EmptyDependencyProvider(component: component)
 }
 
 // MARK: - Registration
+@preconcurrency
+@MainActor
 private func registerProviderFactory(_ componentPath: String, _ factory: @escaping (NeedleFoundation.Scope) -> AnyObject) {
     __DependencyProviderRegistry.instance.registerDependencyProviderFactory(for: componentPath, factory)
 }
 
 #if !NEEDLE_DYNAMIC
 
-@inline(never) private func register1() {
+@inline(never)
+@preconcurrency
+@MainActor
+private func register1() {
     registerProviderFactory("^->RootComponent->LoggedInComponent->GameComponent", factorycf9c02c4def4e3d508816cd03d3cf415b70dfb0e)
     registerProviderFactory("^->RootComponent->LoggedInComponent->GameComponent->ScoreSheetComponent", factory3f7d60e2119708f293bac0d8c882e1e0d9b5eda1)
     registerProviderFactory("^->RootComponent->LoggedInComponent->ScoreSheetComponent", factory3f7d60e2119708f293ba0b20504d5a9e5588d7b3)
@@ -138,6 +158,8 @@ private func registerProviderFactory(_ componentPath: String, _ factory: @escapi
 }
 #endif
 
+@preconcurrency
+@MainActor
 public func registerProviderFactories() {
 #if !NEEDLE_DYNAMIC
     register1()
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift b/Sample/SwiftUI-MVVM/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift
index 2db3b520..6b134cdb 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift
+++ b/Sample/SwiftUI-MVVM/TicTacToe/Sources/ScoreSheet/ScoreSheetComponent.swift
@@ -17,6 +17,7 @@
 import NeedleFoundation
 import SwiftUI
 
+@MainActor
 protocol ScoreSheetDependency: Dependency {
     var scoreStream: ScoreStream { get }
 }
@@ -28,7 +29,7 @@ class ScoreSheetComponent: Component<ScoreSheetDependency>, ScoreSheetBuilder {
             scoreStream: dependency.scoreStream
         )
     }
-    
+
     var scoreSheetView: AnyView {
         return AnyView(
             ScoreSheetView(
@@ -39,6 +40,7 @@ class ScoreSheetComponent: Component<ScoreSheetDependency>, ScoreSheetBuilder {
 }
 
 // Use a builder protocol to allow mocking for unit tests
+@MainActor
 protocol ScoreSheetBuilder {
     var scoreSheetView: AnyView { get }
 }
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/Sources/View+Extension.swift b/Sample/SwiftUI-MVVM/TicTacToe/Sources/View+Extension.swift
index 8f2e0b0c..894c3f6e 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/Sources/View+Extension.swift
+++ b/Sample/SwiftUI-MVVM/TicTacToe/Sources/View+Extension.swift
@@ -18,6 +18,7 @@ import SwiftUI
 
 #if canImport(UIKit)
 extension View {
+    @MainActor
     func hideKeyboard() {
         UIApplication.shared.sendAction(#selector(UIResponder.resignFirstResponder), to: nil, from: nil, for: nil)
     }
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/Tests/RootViewTests.swift b/Sample/SwiftUI-MVVM/TicTacToe/Tests/RootViewTests.swift
index f256fa72..e3ad77d2 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/Tests/RootViewTests.swift
+++ b/Sample/SwiftUI-MVVM/TicTacToe/Tests/RootViewTests.swift
@@ -19,6 +19,7 @@ import SwiftUI
 import Combine
 import XCTest
 
+@MainActor
 class RootViewTests: XCTestCase {
 
     private var loggedOutBuilder: LoggedOutBuilderMock!
diff --git a/Sample/SwiftUI-MVVM/TicTacToe/TicTacToe.xcodeproj/project.pbxproj b/Sample/SwiftUI-MVVM/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
index 8f1a95a9..3cfaa2bf 100644
--- a/Sample/SwiftUI-MVVM/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
+++ b/Sample/SwiftUI-MVVM/TicTacToe/TicTacToe.xcodeproj/project.pbxproj
@@ -589,6 +589,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.uber.needle.tictactoe.TicTacToe;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
@@ -610,6 +611,7 @@
 				PRODUCT_BUNDLE_IDENTIFIER = com.uber.needle.tictactoe.TicTacToe;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				PROVISIONING_PROFILE_SPECIFIER = "";
+				SWIFT_STRICT_CONCURRENCY = complete;
 				SWIFT_VERSION = 5.0;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
diff --git a/Sources/NeedleFoundation/Bootstrap.swift b/Sources/NeedleFoundation/Bootstrap.swift
index cdf50a19..5d8f8e80 100644
--- a/Sources/NeedleFoundation/Bootstrap.swift
+++ b/Sources/NeedleFoundation/Bootstrap.swift
@@ -19,6 +19,8 @@ import Foundation
 /// An empty protocol that can be used for any components that require no
 /// dependencies. This can be used as the dependnecy protocol of the root
 /// component of a dependency graph.
+@preconcurrency
+@MainActor
 public protocol EmptyDependency: AnyObject {}
 
 /// The dependency provider that conforms to `EmptyDependency`. This is
diff --git a/Sources/NeedleFoundation/Component.swift b/Sources/NeedleFoundation/Component.swift
index 075fe2a3..321aab15 100644
--- a/Sources/NeedleFoundation/Component.swift
+++ b/Sources/NeedleFoundation/Component.swift
@@ -17,6 +17,8 @@
 import Foundation
 
 /// The base protocol of a dependency, enabling Needle's parsing process.
+@preconcurrency
+@MainActor
 public protocol Dependency: AnyObject {}
 
 #if NEEDLE_DYNAMIC
@@ -29,6 +31,8 @@ public protocol Registration {
 /// from the `Component` base class, instead of using this protocol
 /// directly.
 /// @CreateMock
+@preconcurrency
+@MainActor
 public protocol Scope: AnyObject {
     /// The path to reach this component on the dependnecy graph.
     var path: [String] { get }
diff --git a/Sources/NeedleFoundation/Internal/DependencyProviderRegistry.swift b/Sources/NeedleFoundation/Internal/DependencyProviderRegistry.swift
index c5d8ff8b..92e09f86 100644
--- a/Sources/NeedleFoundation/Internal/DependencyProviderRegistry.swift
+++ b/Sources/NeedleFoundation/Internal/DependencyProviderRegistry.swift
@@ -26,9 +26,13 @@ import Foundation
 // method in the base component class. Generate extensions to all the
 // component subclasses that override the method to instantiate the
 // dependnecy providers.
+@preconcurrency
+@MainActor
 public class __DependencyProviderRegistry {
 
     /// The singleton instance.
+    @preconcurrency
+    @MainActor
     public static let instance = __DependencyProviderRegistry()
 
     /// Register the given factory closure with given key.
diff --git a/Sources/NeedleFoundation/Pluginized/PluginizedScopeLifecycle.swift b/Sources/NeedleFoundation/Pluginized/PluginizedScopeLifecycle.swift
index 17ef5fa8..7a225c8d 100644
--- a/Sources/NeedleFoundation/Pluginized/PluginizedScopeLifecycle.swift
+++ b/Sources/NeedleFoundation/Pluginized/PluginizedScopeLifecycle.swift
@@ -41,6 +41,8 @@ public protocol ObserverDisposable: AnyObject {
 }
 
 /// The observable of the lifecycle events of a pluginized scope.
+@preconcurrency
+@MainActor
 public protocol PluginizedScopeLifecycleObservable: AnyObject {
 
     /// Observe the lifecycle events with given observer.