diff --git a/Sources/LuminateDI/DIContainer.swift b/Sources/LuminateDI/DIContainer.swift
index 9698aa3..b2cac93 100644
--- a/Sources/LuminateDI/DIContainer.swift
+++ b/Sources/LuminateDI/DIContainer.swift
@@ -1,10 +1,10 @@
 import Foundation
 
-public final class DIContainer {
+public final class DIContainer: @unchecked Sendable {
 
     public static let shared = DIContainer()
     public private(set) var values = InjectionValues()
-    private var observers: [AnyKeyPath: [UUID: () -> Void]] = [:]
+    private var observers: [AnyKeyPath: [UUID: @Sendable () -> Void]] = [:]
     private let lock = NSLock()
 
     private init() {}
@@ -36,7 +36,7 @@ public final class DIContainer {
     @discardableResult
     func addObserver<T>(
         for keyPath: KeyPath<InjectionValues, T?>,
-        handler: @escaping () -> Void
+        handler: @escaping @Sendable () -> Void
     ) -> UUID {
         let id = UUID()
         lock.withLock {
@@ -54,7 +54,7 @@ public final class DIContainer {
     }
 
     private func notifyObservers(for keyPath: AnyKeyPath) {
-        let handlers: [() -> Void] = lock.withLock {
+        let handlers: [@Sendable () -> Void] = lock.withLock {
             Array(observers[keyPath]?.values ?? [])
         }
         handlers.forEach { $0() }