diff --git a/CacheIsKingTests/CacheIsKingTests.swift b/CacheIsKingTests/CacheIsKingTests.swift
index 7ff3a95..89a6ba2 100644
--- a/CacheIsKingTests/CacheIsKingTests.swift
+++ b/CacheIsKingTests/CacheIsKingTests.swift
@@ -160,7 +160,7 @@ class CacheIsKingTests: XCTestCase {
 
 		XCTAssert(cache.count == 4)
 
-		NSNotificationCenter.defaultCenter().postNotificationName(UIApplicationDidReceiveMemoryWarningNotification, object: nil)
+		NSNotificationCenter.defaultCenter().postNotificationName(UIApplicationDidReceiveMemoryWarningNotification, object: UIApplication.sharedApplication())
 
 		XCTAssert(cache.count == 0)
 
@@ -171,7 +171,7 @@ class CacheIsKingTests: XCTestCase {
 
 		XCTAssert(cache.count == 4)
 
-		NSNotificationCenter.defaultCenter().postNotificationName(UIApplicationDidEnterBackgroundNotification, object: nil)
+		NSNotificationCenter.defaultCenter().postNotificationName(UIApplicationDidEnterBackgroundNotification, object: UIApplication.sharedApplication())
 
 		XCTAssert(cache.count == 0)
 	}
diff --git a/Source/KingCache.swift b/Source/KingCache.swift
index a655ac2..faf43c7 100644
--- a/Source/KingCache.swift
+++ b/Source/KingCache.swift
@@ -33,13 +33,13 @@ public class KingCache {
 
 		var notificationObserver = NSNotificationCenter.defaultCenter()
 			.addObserverForName(UIApplicationDidReceiveMemoryWarningNotification,
-				object: nil,
+				object: UIApplication.sharedApplication(),
 				queue: nil,
 				usingBlock: removalBlock)
 		notificationObservers.append(notificationObserver)
 		notificationObserver = NSNotificationCenter.defaultCenter()
 			.addObserverForName(UIApplicationDidEnterBackgroundNotification,
-				object: nil,
+				object: UIApplication.sharedApplication(),
 				queue: nil,
 				usingBlock: removalBlock)
 		notificationObservers.append(notificationObserver)