diff --git a/pybotx/models/base_command.py b/pybotx/models/base_command.py
index e16ed232..3ad82203 100644
--- a/pybotx/models/base_command.py
+++ b/pybotx/models/base_command.py
@@ -38,6 +38,7 @@ class BaseBotAPIContext(VerifiedPayloadBaseModel):
 
 class BotAPIUserContext(BaseBotAPIContext):
     user_huid: UUID
+    user_udid: Optional[UUID]
     ad_domain: Optional[str]
     ad_login: Optional[str]
     username: Optional[str]
diff --git a/pybotx/models/message/incoming_message.py b/pybotx/models/message/incoming_message.py
index f1b4a7c5..e9ba34bd 100644
--- a/pybotx/models/message/incoming_message.py
+++ b/pybotx/models/message/incoming_message.py
@@ -62,6 +62,7 @@ class UserDevice:
 @dataclass
 class UserSender:
     huid: UUID
+    udid: Optional[UUID]
     ad_login: Optional[str]
     ad_domain: Optional[str]
     username: Optional[str]
@@ -225,6 +226,7 @@ def to_domain(self, raw_command: Dict[str, Any]) -> IncomingMessage:  # noqa: WP
 
         sender = UserSender(
             huid=self.sender.user_huid,
+            udid=self.sender.user_udid,
             ad_login=self.sender.ad_login,
             ad_domain=self.sender.ad_domain,
             username=self.sender.username,
diff --git a/pybotx/models/system_events/smartapp_event.py b/pybotx/models/system_events/smartapp_event.py
index 0d834cc3..4bdcbbf2 100644
--- a/pybotx/models/system_events/smartapp_event.py
+++ b/pybotx/models/system_events/smartapp_event.py
@@ -95,6 +95,7 @@ def to_domain(self, raw_command: Dict[str, Any]) -> SmartAppEvent:
 
         sender = UserSender(
             huid=self.sender.user_huid,
+            udid=self.sender.user_udid,
             ad_login=self.sender.ad_login,
             ad_domain=self.sender.ad_domain,
             username=self.sender.username,
diff --git a/pyproject.toml b/pyproject.toml
index b02c13ae..3f613057 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pybotx"
-version = "0.55.0"
+version = "0.55.1"
 description = "A python library for interacting with eXpress BotX API"
 authors = [
     "Sidnev Nikolay <nsidnev@ccsteam.ru>",
diff --git a/tests/conftest.py b/tests/conftest.py
index 98dbd870..489db883 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -184,6 +184,7 @@ def decorator(
                     if user_huid
                     else "f16cdc5f-6366-5552-9ecd-c36290ab3d11"
                 ),
+                "user_udid": None,
                 "username": None,
             },
             "proto_version": 4,
@@ -215,6 +216,7 @@ def decorator(
             metadata={},
             sender=UserSender(
                 huid=uuid4(),
+                udid=None,
                 ad_login=ad_login,
                 ad_domain=ad_domain,
                 username=None,
diff --git a/tests/system_events/test_smartapp_event.py b/tests/system_events/test_smartapp_event.py
index 3b9b8cb4..b39d141d 100644
--- a/tests/system_events/test_smartapp_event.py
+++ b/tests/system_events/test_smartapp_event.py
@@ -68,6 +68,7 @@ async def test__smartapp__succeed(
         "entities": [],
         "from": {
             "user_huid": "b9197d3a-d855-5d34-ba8a-eff3a975ab20",
+            "user_udid": None,
             "group_chat_id": "dea55ee4-7a9f-5da0-8c73-079f400ee517",
             "host": "cts.example.com",
             "ad_login": None,
@@ -141,6 +142,7 @@ async def smartapp_handler(event: SmartAppEvent, bot: Bot) -> None:
         ),
         sender=UserSender(
             huid=UUID("b9197d3a-d855-5d34-ba8a-eff3a975ab20"),
+            udid=None,
             ad_login=None,
             ad_domain=None,
             username=None,
diff --git a/tests/test_incoming_message.py b/tests/test_incoming_message.py
index e0c45bf2..0886fba6 100644
--- a/tests/test_incoming_message.py
+++ b/tests/test_incoming_message.py
@@ -65,6 +65,7 @@ async def test__async_execute_raw_bot_command__minimally_filled_incoming_message
             "platform": None,
             "platform_package_id": None,
             "user_huid": "f16cdc5f-6366-5552-9ecd-c36290ab3d11",
+            "user_udid": None,
             "username": None,
         },
         "proto_version": 4,
@@ -99,6 +100,7 @@ async def default_handler(message: IncomingMessage, bot: Bot) -> None:
         metadata={},
         sender=UserSender(
             huid=UUID("f16cdc5f-6366-5552-9ecd-c36290ab3d11"),
+            udid=None,
             ad_login=None,
             ad_domain=None,
             username=None,
@@ -221,6 +223,7 @@ async def test__async_execute_raw_bot_command__maximum_filled_incoming_message(
             "platform": "web",
             "platform_package_id": "ru.unlimitedtech.express",
             "user_huid": "f16cdc5f-6366-5552-9ecd-c36290ab3d11",
+            "user_udid": "2f18d97b-201b-434d-ac1f-3c6d4b066117",
             "username": "Ivanov Ivan Ivanovich",
         },
         "proto_version": 4,
@@ -255,6 +258,7 @@ async def default_handler(message: IncomingMessage, bot: Bot) -> None:
         metadata={"message": "metadata"},
         sender=UserSender(
             huid=UUID("f16cdc5f-6366-5552-9ecd-c36290ab3d11"),
+            udid=UUID("2f18d97b-201b-434d-ac1f-3c6d4b066117"),
             ad_login="login",
             ad_domain="domain",
             username="Ivanov Ivan Ivanovich",
@@ -407,6 +411,7 @@ async def test__async_execute_raw_bot_command__all_mention_types(
             "platform": None,
             "platform_package_id": None,
             "user_huid": "f16cdc5f-6366-5552-9ecd-c36290ab3d11",
+            "user_udid": None,
             "username": None,
         },
         "proto_version": 4,
@@ -499,6 +504,7 @@ async def test__async_execute_raw_bot_command__unknown_entity_type(
             "platform": None,
             "platform_package_id": None,
             "user_huid": "f16cdc5f-6366-5552-9ecd-c36290ab3d11",
+            "user_udid": None,
             "username": None,
         },
         "proto_version": 4,
@@ -549,6 +555,7 @@ async def test__async_execute_raw_bot_command__unsupported_chat_type_accepted(
             "platform": None,
             "platform_package_id": None,
             "user_huid": "f16cdc5f-6366-5552-9ecd-c36290ab3d11",
+            "user_udid": None,
             "username": None,
         },
         "proto_version": 4,