diff --git a/lib/src/telegram/model.g.dart b/lib/src/telegram/model.g.dart
index d9713db..c9f349c 100644
--- a/lib/src/telegram/model.g.dart
+++ b/lib/src/telegram/model.g.dart
@@ -3387,7 +3387,8 @@ Map<String, dynamic> _$MessageIdToJson(MessageId instance) => <String, dynamic>{
 MessageOriginChannel _$MessageOriginChannelFromJson(
         Map<String, dynamic> json) =>
     MessageOriginChannel(
-      type: $enumDecode(_$MessageOriginTypeEnumMap, json['type']),
+      type: $enumDecodeNullable(_$MessageOriginTypeEnumMap, json['type']) ??
+          MessageOriginType.channel,
       date: json['date'] as int,
       chat: Chat.fromJson(json['chat'] as Map<String, dynamic>),
       messageId: json['message_id'] as int,
@@ -3422,7 +3423,8 @@ const _$MessageOriginTypeEnumMap = {
 
 MessageOriginChat _$MessageOriginChatFromJson(Map<String, dynamic> json) =>
     MessageOriginChat(
-      type: $enumDecode(_$MessageOriginTypeEnumMap, json['type']),
+      type: $enumDecodeNullable(_$MessageOriginTypeEnumMap, json['type']) ??
+          MessageOriginType.chat,
       date: json['date'] as int,
       senderChat: Chat.fromJson(json['sender_chat'] as Map<String, dynamic>),
       authorSignature: json['author_signature'] as String?,
@@ -3448,7 +3450,8 @@ Map<String, dynamic> _$MessageOriginChatToJson(MessageOriginChat instance) {
 MessageOriginHiddenUser _$MessageOriginHiddenUserFromJson(
         Map<String, dynamic> json) =>
     MessageOriginHiddenUser(
-      type: $enumDecode(_$MessageOriginTypeEnumMap, json['type']),
+      type: $enumDecodeNullable(_$MessageOriginTypeEnumMap, json['type']) ??
+          MessageOriginType.hiddenUser,
       date: json['date'] as int,
       senderUserName: json['sender_user_name'] as String,
     );
@@ -3463,7 +3466,8 @@ Map<String, dynamic> _$MessageOriginHiddenUserToJson(
 
 MessageOriginUser _$MessageOriginUserFromJson(Map<String, dynamic> json) =>
     MessageOriginUser(
-      type: $enumDecode(_$MessageOriginTypeEnumMap, json['type']),
+      type: $enumDecodeNullable(_$MessageOriginTypeEnumMap, json['type']) ??
+          MessageOriginType.user,
       date: json['date'] as int,
       senderUser: User.fromJson(json['sender_user'] as Map<String, dynamic>),
     );
diff --git a/lib/src/telegram/models/message_origin_channel.dart b/lib/src/telegram/models/message_origin_channel.dart
index 44009a2..fa91b46 100644
--- a/lib/src/telegram/models/message_origin_channel.dart
+++ b/lib/src/telegram/models/message_origin_channel.dart
@@ -32,7 +32,7 @@ class MessageOriginChannel implements MessageOrigin {
   String? authorSignature;
 
   MessageOriginChannel({
-    required this.type,
+    this.type = MessageOriginType.channel,
     required this.date,
     required this.chat,
     required this.messageId,
diff --git a/lib/src/telegram/models/message_origin_chat.dart b/lib/src/telegram/models/message_origin_chat.dart
index a3489b5..3bb3387 100644
--- a/lib/src/telegram/models/message_origin_chat.dart
+++ b/lib/src/telegram/models/message_origin_chat.dart
@@ -31,7 +31,7 @@ class MessageOriginChat implements MessageOrigin {
   String? authorSignature;
 
   MessageOriginChat({
-    required this.type,
+    this.type = MessageOriginType.chat,
     required this.date,
     required this.senderChat,
     this.authorSignature,
diff --git a/lib/src/telegram/models/message_origin_hidden_user.dart b/lib/src/telegram/models/message_origin_hidden_user.dart
index 15acce2..63147a7 100644
--- a/lib/src/telegram/models/message_origin_hidden_user.dart
+++ b/lib/src/telegram/models/message_origin_hidden_user.dart
@@ -30,7 +30,7 @@ class MessageOriginHiddenUser implements MessageOrigin {
   String senderUserName;
 
   MessageOriginHiddenUser({
-    required this.type,
+    this.type = MessageOriginType.hiddenUser,
     required this.date,
     required this.senderUserName,
   });
diff --git a/lib/src/telegram/models/message_origin_user.dart b/lib/src/telegram/models/message_origin_user.dart
index 924fb32..a2ab37a 100644
--- a/lib/src/telegram/models/message_origin_user.dart
+++ b/lib/src/telegram/models/message_origin_user.dart
@@ -30,7 +30,7 @@ class MessageOriginUser implements MessageOrigin {
   User senderUser;
 
   MessageOriginUser({
-    required this.type,
+    this.type = MessageOriginType.user,
     required this.date,
     required this.senderUser,
   });