diff --git a/AUTHORS b/AUTHORS
index b27c156188f8..de37463822a2 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -56,4 +56,5 @@ Giancarlo Rocha <giancarloiff@gmail.com>
 Ryo Miyake <ryo@miyake.id>
 Théo Champion <contact.theochampion@gmail.com>
 Kazuki Yamaguchi <y.kazuki0614n@gmail.com>
-Eitan Schwartz <eshvartz@gmail.com>
\ No newline at end of file
+Eitan Schwartz <eshvartz@gmail.com>
+Simão Garcia <simaogarcia@gmail.com>
\ No newline at end of file
diff --git a/packages/local_auth/CHANGELOG.md b/packages/local_auth/CHANGELOG.md
index b6941dc4f234..213648327715 100644
--- a/packages/local_auth/CHANGELOG.md
+++ b/packages/local_auth/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.6.3
+
+* Fix app crash when trying to display lockOut alertMessage on iOS
+
 ## 0.6.2+2
 
 * Update lower bound of dart dependency to 2.1.0.
diff --git a/packages/local_auth/ios/Classes/FLTLocalAuthPlugin.m b/packages/local_auth/ios/Classes/FLTLocalAuthPlugin.m
index aa0c217ef543..292a351d93a9 100644
--- a/packages/local_auth/ios/Classes/FLTLocalAuthPlugin.m
+++ b/packages/local_auth/ios/Classes/FLTLocalAuthPlugin.m
@@ -147,11 +147,12 @@ - (void)handleErrors:(NSError *)authError
       errorCode = authError.code == LAErrorPasscodeNotSet ? @"PasscodeNotSet" : @"NotEnrolled";
       break;
     case LAErrorTouchIDLockout:
-      [self alertMessage:arguments[@"lockOut"]
-               firstButton:arguments[@"okButton"]
-             flutterResult:result
-          additionalButton:nil];
-      return;
+      dispatch_async(dispatch_get_main_queue(), ^{
+       [self alertMessage:arguments[@"lockOut"]
+          firstButton:arguments[@"okButton"]
+         flutterResult:result
+       additionalButton:nil];
+     });
   }
   result([FlutterError errorWithCode:errorCode
                              message:authError.localizedDescription
diff --git a/packages/local_auth/pubspec.yaml b/packages/local_auth/pubspec.yaml
index b43f6b91d80c..c01f3acff334 100644
--- a/packages/local_auth/pubspec.yaml
+++ b/packages/local_auth/pubspec.yaml
@@ -2,7 +2,7 @@ name: local_auth
 description: Flutter plugin for Android and iOS device authentication sensors
   such as Fingerprint Reader and Touch ID.
 homepage: https://github.com/flutter/plugins/tree/master/packages/local_auth
-version: 0.6.2+2
+version: 0.6.3
 
 flutter:
   plugin: