diff --git a/Assets/Plugins/iOS/AppboyAppDelegate.mm b/Assets/Plugins/iOS/AppboyAppDelegate.mm
index 4f4bded7a..d8a227769 100644
--- a/Assets/Plugins/iOS/AppboyAppDelegate.mm
+++ b/Assets/Plugins/iOS/AppboyAppDelegate.mm
@@ -33,14 +33,18 @@ - (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(N
 }
 
 - (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
-  [super application:application didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
+  if ([UnityAppController instancesRespondToSelector:@selector(application:didRegisterForRemoteNotificationsWithDeviceToken:)]) {
+    [super application:application didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
+  }
   NSLog(@"AppboyAppDelegate called from application:didRegisterForRemoteNotificationsWithDeviceToken with token %@", deviceToken);
   // Register push token with Appboy
   [[AppboyUnityManager sharedInstance] registerPushToken:deviceToken];
 }
 
 - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
-  [super application:application didReceiveRemoteNotification:userInfo];
+  if ([UnityAppController instancesRespondToSelector:@selector(application:didReceiveRemoteNotification:)]) {
+    [super application:application didReceiveRemoteNotification:userInfo];
+  }
   NSLog(@"AppboyAppDelegate called from application:didReceiveRemoteNotification:. UIApplicationState is %ld", (long)[[UIApplication sharedApplication] applicationState]);
   
   // Pass notification to Appboy
@@ -49,7 +53,9 @@ - (void)application:(UIApplication *)application didReceiveRemoteNotification:(N
 }
 
 - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))handler {
-  [super application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:handler];
+  if ([UnityAppController instancesRespondToSelector:@selector(application:didReceiveRemoteNotification:fetchCompletionHandler:)]) {
+    [super application:application didReceiveRemoteNotification:userInfo fetchCompletionHandler:handler];
+  }
   NSLog(@"AppboyAppDelegate called from application:didReceiveRemoteNotification:fetchCompletionHandler:. UIApplicationState is %ld", (long)[[UIApplication sharedApplication] applicationState]);
   
   // Pass notification to Appboy
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c89dc2ce7..81e12e9ee 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 1.8.2
+* Updates the SDK to be compatible with unity 5.4+.  In 5.4.0 Unity stopped implementing push delegates in UnityAppController in certain conditions, causing a crash when the Appboy SDK tried to call them.
+
 ## 1.8.1
 * Updates SDK to modify delegate usage to fix an issue with push-click handling introduced in iOS 10 - see https://github.com/Appboy/appboy-ios-sdk/blob/master/CHANGELOG.md for details.