diff --git a/Objective-C/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.m b/Objective-C/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.m
index e4ed7661..6f90d815 100644
--- a/Objective-C/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.m
+++ b/Objective-C/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.m
@@ -78,7 +78,7 @@ - (void)loadAd {
   }
   _isLoadingAd = YES;
   NSLog(@"Start loading app open ad.");
-  [GADAppOpenAd loadWithAdUnitID:@"ca-app-pub-3940256099942544/5662855259"
+  [GADAppOpenAd loadWithAdUnitID:@"ca-app-pub-3940256099942544/5575463023"
                          request:[GADRequest request]
                      orientation:UIInterfaceOrientationPortrait
                completionHandler:^(GADAppOpenAd * _Nullable appOpenAd, NSError * _Nullable error) {
diff --git a/Swift/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.swift b/Swift/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.swift
index 86d12f77..0b487957 100644
--- a/Swift/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.swift
+++ b/Swift/admob/AppOpenExample/AppOpenExample/AppOpenAdManager.swift
@@ -67,7 +67,7 @@ class AppOpenAdManager: NSObject {
     isLoadingAd = true
     print("Start loading app open ad.")
     GADAppOpenAd.load(
-      withAdUnitID: "ca-app-pub-3940256099942544/5662855259",
+      withAdUnitID: "ca-app-pub-3940256099942544/5575463023",
       request: GADRequest(),
       orientation: UIInterfaceOrientation.portrait
     ) { ad, error in