diff --git a/packages/google_sign_in/google_sign_in/CHANGELOG.md b/packages/google_sign_in/google_sign_in/CHANGELOG.md
index 761ba0476eff..3a09cd6e4809 100644
--- a/packages/google_sign_in/google_sign_in/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.5.3
+
+* Prevent exceptions from crashing app on iOS.
+
 ## 4.5.2
 
 * Update package:e2e reference to use the local version in the flutter/plugins
diff --git a/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m b/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
index f621d1e68312..90802035afd6 100644
--- a/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
+++ b/packages/google_sign_in/google_sign_in/ios/Classes/FLTGoogleSignInPlugin.m
@@ -80,7 +80,9 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
         [GIDSignIn sharedInstance].clientID = plist[kClientIdKey];
         [GIDSignIn sharedInstance].serverClientID = plist[kServerClientIdKey];
         [GIDSignIn sharedInstance].scopes = call.arguments[@"scopes"];
-        [GIDSignIn sharedInstance].hostedDomain = call.arguments[@"hostedDomain"];
+        NSString *hostedDomain = call.arguments[@"hostedDomain"];
+        [GIDSignIn sharedInstance].hostedDomain =
+            hostedDomain != (id)[NSNull null] ? hostedDomain : @"";
         result(nil);
       } else {
         result([FlutterError errorWithCode:@"missing-config"
@@ -102,7 +104,6 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
         [[GIDSignIn sharedInstance] signIn];
       } @catch (NSException *e) {
         result([FlutterError errorWithCode:@"google_sign_in" message:e.reason details:e.name]);
-        [e raise];
       }
     }
   } else if ([call.method isEqualToString:@"getTokens"]) {
@@ -240,9 +241,11 @@ - (void)signIn:(GIDSignIn *)signIn
 #pragma mark - private methods
 
 - (void)respondWithAccount:(id)account error:(NSError *)error {
-  FlutterResult result = _accountRequest;
-  _accountRequest = nil;
-  result(error != nil ? getFlutterError(error) : account);
+  dispatch_async(dispatch_get_main_queue(), ^{
+    FlutterResult result = _accountRequest;
+    _accountRequest = nil;
+    result(error != nil ? getFlutterError(error) : account);
+  });
 }
 
 - (UIViewController *)topViewController {
diff --git a/packages/google_sign_in/google_sign_in/pubspec.yaml b/packages/google_sign_in/google_sign_in/pubspec.yaml
index e76dbedfa116..e73b905b7b12 100644
--- a/packages/google_sign_in/google_sign_in/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in/pubspec.yaml
@@ -2,7 +2,7 @@ name: google_sign_in
 description: Flutter plugin for Google Sign-In, a secure authentication system
   for signing in with a Google account on Android and iOS.
 homepage: https://github.com/flutter/plugins/tree/master/packages/google_sign_in/google_sign_in
-version: 4.5.2
+version: 4.5.3
 
 flutter:
   plugin: