diff --git a/data/cognito_event.json b/data/cognito_event.json
index 6dee8245..22ca0cd3 100644
--- a/data/cognito_event.json
+++ b/data/cognito_event.json
@@ -1,5 +1,5 @@
 {
-    "version": 1,
+    "version": "1",
     "triggerSource": "CustomMessage_SignUp/CustomMessage_ResendCode/CustomMessage_ForgotPassword/CustomMessage_VerifyUserAttribute",
     "region": "eu-west-1",
     "userPoolId": "1234567",
diff --git a/lib/events/cognito_event.dart b/lib/events/cognito_event.dart
index 4c8862f3..d9f3529f 100644
--- a/lib/events/cognito_event.dart
+++ b/lib/events/cognito_event.dart
@@ -5,7 +5,7 @@ part 'cognito_event.g.dart';
 @JsonSerializable()
 class AwsCognitoEvent {
   @JsonKey()
-  final int version;
+  final String version;
 
   @JsonKey()
   final String triggerSource;
diff --git a/lib/events/cognito_event.g.dart b/lib/events/cognito_event.g.dart
index 99584150..18d3a72a 100644
--- a/lib/events/cognito_event.g.dart
+++ b/lib/events/cognito_event.g.dart
@@ -8,7 +8,7 @@ part of 'cognito_event.dart';
 
 AwsCognitoEvent _$AwsCognitoEventFromJson(Map<String, dynamic> json) {
   return AwsCognitoEvent(
-    version: json['version'] as int,
+    version: json['version'] as String,
     triggerSource: json['triggerSource'] as String,
     region: json['region'] as String,
     userPoolId: json['userPoolId'] as String,
diff --git a/test/cognito_event_test.dart b/test/cognito_event_test.dart
index 24ba6966..8b0ca247 100644
--- a/test/cognito_event_test.dart
+++ b/test/cognito_event_test.dart
@@ -14,7 +14,7 @@ void main() {
     test("json got parsed and creates an event", () async {
       final event = AwsCognitoEvent.fromJson(json);
 
-      expect(event.version, equals(1));
+      expect(event.version, equals("1"));
       expect(event.userPoolId, equals("1234567"));
       expect(event.userName, equals("foo"));
       expect(event.response.smsMessage, equals("foo"));