diff --git a/src/pymax/types/domain/message.py b/src/pymax/types/domain/message.py
index cd758bc..ed35ce5 100644
--- a/src/pymax/types/domain/message.py
+++ b/src/pymax/types/domain/message.py
@@ -108,13 +108,13 @@ class ReplyLink(MessageLink):
 
     :ivar message: Сообщение, на которое ответили.
     :vartype message: Message
-    :ivar chat_id: ID чата исходного сообщения.
-    :vartype chat_id: int
+    :ivar chat_id: ID чата исходного сообщения, если сервер его прислал.
+    :vartype chat_id: int | None
     """
 
     type: Literal[LinkType.REPLY] = LinkType.REPLY
     message: Message
-    chat_id: int
+    chat_id: int | None = None
 
 
 class ForwardLink(MessageLink):
@@ -126,13 +126,13 @@ class ForwardLink(MessageLink):
 
     :ivar message: Исходное сообщение.
     :vartype message: Message
-    :ivar chat_id: ID исходного чата.
-    :vartype chat_id: int
+    :ivar chat_id: ID исходного чата, если сервер его прислал.
+    :vartype chat_id: int | None
     """
 
     type: Literal[LinkType.FORWARD] = LinkType.FORWARD
     message: Message
-    chat_id: int
+    chat_id: int | None = None
     chat_name: str | None = None
     chat_link: str | None = None
     chat_access_type: AccessType | None = None
diff --git a/tests/domain/test_message_models.py b/tests/domain/test_message_models.py
index baf57a9..5d0dece 100644
--- a/tests/domain/test_message_models.py
+++ b/tests/domain/test_message_models.py
@@ -2,6 +2,7 @@
 
 from pymax.types.domain import (
     AudioAttachment,
+    LinkType,
     Message,
     PollAttachment,
     UnknownAttachment,
@@ -139,3 +140,48 @@ def test_message_elements_accept_missing_length_and_attribute_url() -> None:
     assert element.length is None
     assert element.attributes is not None
     assert element.attributes.url is None
+
+
+def test_message_link_reply_without_chat_id_is_accepted() -> None:
+    """Сервер может прислать reply без chatId в link — сообщение не должно
+    отбрасываться целиком из-за одного необязательного поля."""
+    payload = message_payload(1, 100)
+    payload["link"] = {
+        "type": "REPLY",
+        "message": message_payload(5, 100, text="quoted"),
+    }
+
+    message = Message.model_validate(payload)
+
+    assert message.link is not None
+    assert message.link.type == LinkType.REPLY
+    assert message.link.chat_id is None
+    assert message.link.message.text == "quoted"
+
+
+def test_message_link_forward_without_chat_id_is_accepted() -> None:
+    payload = message_payload(1, 100)
+    payload["link"] = {
+        "type": "FORWARD",
+        "message": message_payload(6, 100, text="fwd"),
+    }
+
+    message = Message.model_validate(payload)
+
+    assert message.link is not None
+    assert message.link.type == LinkType.FORWARD
+    assert message.link.chat_id is None
+
+
+def test_message_link_with_chat_id_unchanged() -> None:
+    payload = message_payload(1, 100)
+    payload["link"] = {
+        "type": "REPLY",
+        "message": message_payload(5, 100),
+        "chatId": 200,
+    }
+
+    message = Message.model_validate(payload)
+
+    assert message.link is not None
+    assert message.link.chat_id == 200