diff --git a/aiogram/api/client/bot.py b/aiogram/api/client/bot.py
index 96061c24..0d2bf1d9 100644
--- a/aiogram/api/client/bot.py
+++ b/aiogram/api/client/bot.py
@@ -95,6 +95,7 @@ from ..methods import (
     UploadStickerFile,
 )
 from ..types import (
+    UNSET,
     BotCommand,
     Chat,
     ChatMember,
@@ -440,7 +441,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         self,
         chat_id: Union[int, str],
         text: str,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         disable_web_page_preview: Optional[bool] = None,
         disable_notification: Optional[bool] = None,
         reply_to_message_id: Optional[int] = None,
@@ -512,7 +513,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         chat_id: Union[int, str],
         photo: Union[InputFile, str],
         caption: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         disable_notification: Optional[bool] = None,
         reply_to_message_id: Optional[int] = None,
         reply_markup: Optional[
@@ -558,7 +559,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         chat_id: Union[int, str],
         audio: Union[InputFile, str],
         caption: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         duration: Optional[int] = None,
         performer: Optional[str] = None,
         title: Optional[str] = None,
@@ -626,7 +627,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         document: Union[InputFile, str],
         thumb: Optional[Union[InputFile, str]] = None,
         caption: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         disable_notification: Optional[bool] = None,
         reply_to_message_id: Optional[int] = None,
         reply_markup: Optional[
@@ -686,7 +687,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         height: Optional[int] = None,
         thumb: Optional[Union[InputFile, str]] = None,
         caption: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         supports_streaming: Optional[bool] = None,
         disable_notification: Optional[bool] = None,
         reply_to_message_id: Optional[int] = None,
@@ -755,7 +756,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         height: Optional[int] = None,
         thumb: Optional[Union[InputFile, str]] = None,
         caption: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         disable_notification: Optional[bool] = None,
         reply_to_message_id: Optional[int] = None,
         reply_markup: Optional[
@@ -817,7 +818,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         chat_id: Union[int, str],
         voice: Union[InputFile, str],
         caption: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         duration: Optional[int] = None,
         disable_notification: Optional[bool] = None,
         reply_to_message_id: Optional[int] = None,
@@ -1819,7 +1820,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         chat_id: Optional[Union[int, str]] = None,
         message_id: Optional[int] = None,
         inline_message_id: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         disable_web_page_preview: Optional[bool] = None,
         reply_markup: Optional[InlineKeyboardMarkup] = None,
     ) -> Union[Message, bool]:
@@ -1861,7 +1862,7 @@ class Bot(ContextInstanceMixin["Bot"]):
         message_id: Optional[int] = None,
         inline_message_id: Optional[str] = None,
         caption: Optional[str] = None,
-        parse_mode: Optional[str] = None,
+        parse_mode: Optional[str] = UNSET,
         reply_markup: Optional[InlineKeyboardMarkup] = None,
     ) -> Union[Message, bool]:
         """
diff --git a/aiogram/api/methods/base.py b/aiogram/api/methods/base.py
index 8d15edba..4fcd9ae9 100644
--- a/aiogram/api/methods/base.py
+++ b/aiogram/api/methods/base.py
@@ -4,10 +4,10 @@ import abc
 import secrets
 from typing import TYPE_CHECKING, Any, Dict, Generator, Generic, Optional, TypeVar, Union
 
-from pydantic import BaseConfig, BaseModel, Extra
+from pydantic import BaseConfig, BaseModel, Extra, root_validator
 from pydantic.generics import GenericModel
 
-from ..types import InputFile, ResponseParameters
+from ..types import UNSET, InputFile, ResponseParameters
 
 if TYPE_CHECKING:  # pragma: no cover
     from ..client.bot import Bot
@@ -46,6 +46,20 @@ class TelegramMethod(abc.ABC, BaseModel, Generic[T]):
         arbitrary_types_allowed = True
         orm_mode = True
 
+    @root_validator(pre=True)
+    def remove_unset(cls, values: Dict[str, Any]) -> Dict[str, Any]:
+        """
+        Remove UNSET from `parse_mode` before fields validation.
+
+        We use UNSET as a sentinel value for `parse_mode` and replace it to real value later.
+        It isn't a problem when it's just default value for a model field, but UNSET might be passing to
+        a model initialization from `Bot.method_name`, so we must take care of it and
+        remove it before fields validation.
+        """
+        if "parse_mode" in values and values["parse_mode"] is UNSET:
+            values.pop("parse_mode")
+        return values
+
     @property
     @abc.abstractmethod
     def __returning__(self) -> type:  # pragma: no cover
@@ -116,18 +130,24 @@ def prepare_media_file(data: Dict[str, Any], files: Dict[str, InputFile]) -> Non
 
 
 def prepare_parse_mode(root: Any, parse_mode_property: str = "parse_mode") -> None:
+    """
+    Find and set parse_mode with highest priority.
+
+    Developer can manually set parse_mode for each message (or message-like) object,
+    but if parse_mode was unset we should use value from Bot object.
+
+    We can't use None for "unset state", because None itself is the parse_mode option.
+    """
     if isinstance(root, list):
         for item in root:
             prepare_parse_mode(item, parse_mode_property=parse_mode_property)
         return
 
-    if root.get(parse_mode_property):
-        return
+    if root.get(parse_mode_property, UNSET) is UNSET:
+        from ..client.bot import Bot
 
-    from ..client.bot import Bot
-
-    bot = Bot.get_current(no_error=True)
-    if bot and bot.parse_mode:
-        root[parse_mode_property] = bot.parse_mode
-        return
-    return
+        bot = Bot.get_current(no_error=True)
+        if bot and bot.parse_mode:
+            root[parse_mode_property] = bot.parse_mode
+        else:
+            root[parse_mode_property] = None
diff --git a/aiogram/api/methods/edit_message_caption.py b/aiogram/api/methods/edit_message_caption.py
index c0e14469..ebbe9c7b 100644
--- a/aiogram/api/methods/edit_message_caption.py
+++ b/aiogram/api/methods/edit_message_caption.py
@@ -1,6 +1,6 @@
 from typing import Any, Dict, Optional, Union
 
-from ..types import InlineKeyboardMarkup, Message
+from ..types import UNSET, InlineKeyboardMarkup, Message
 from .base import Request, TelegramMethod, prepare_parse_mode
 
 
@@ -23,8 +23,9 @@ class EditMessageCaption(TelegramMethod[Union[Message, bool]]):
     """Required if chat_id and message_id are not specified. Identifier of the inline message"""
     caption: Optional[str] = None
     """New caption of the message, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the message caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """A JSON-serialized object for an inline keyboard."""
 
diff --git a/aiogram/api/methods/edit_message_text.py b/aiogram/api/methods/edit_message_text.py
index da1da00f..20098fdc 100644
--- a/aiogram/api/methods/edit_message_text.py
+++ b/aiogram/api/methods/edit_message_text.py
@@ -1,6 +1,6 @@
 from typing import Any, Dict, Optional, Union
 
-from ..types import InlineKeyboardMarkup, Message
+from ..types import UNSET, InlineKeyboardMarkup, Message
 from .base import Request, TelegramMethod
 
 
@@ -23,8 +23,9 @@ class EditMessageText(TelegramMethod[Union[Message, bool]]):
     """Required if inline_message_id is not specified. Identifier of the message to edit"""
     inline_message_id: Optional[str] = None
     """Required if chat_id and message_id are not specified. Identifier of the inline message"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the message text. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in your bot's message."""
     disable_web_page_preview: Optional[bool] = None
     """Disables link previews for links in this message"""
     reply_markup: Optional[InlineKeyboardMarkup] = None
diff --git a/aiogram/api/methods/send_animation.py b/aiogram/api/methods/send_animation.py
index 6e5f6444..aca62a40 100644
--- a/aiogram/api/methods/send_animation.py
+++ b/aiogram/api/methods/send_animation.py
@@ -1,6 +1,7 @@
 from typing import Any, Dict, Optional, Union
 
 from ..types import (
+    UNSET,
     ForceReply,
     InlineKeyboardMarkup,
     InputFile,
@@ -45,9 +46,9 @@ class SendAnimation(TelegramMethod[Message]):
     caption: Optional[str] = None
     """Animation caption (may also be used when resending animation by file_id), 0-1024 characters
     after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the animation caption. See formatting options for more
-    details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     disable_notification: Optional[bool] = None
     """Sends the message silently. Users will receive a notification with no sound."""
     reply_to_message_id: Optional[int] = None
diff --git a/aiogram/api/methods/send_audio.py b/aiogram/api/methods/send_audio.py
index d56782e5..be4870c4 100644
--- a/aiogram/api/methods/send_audio.py
+++ b/aiogram/api/methods/send_audio.py
@@ -1,6 +1,7 @@
 from typing import Any, Dict, Optional, Union
 
 from ..types import (
+    UNSET,
     ForceReply,
     InlineKeyboardMarkup,
     InputFile,
@@ -33,8 +34,9 @@ class SendAudio(TelegramMethod[Message]):
     file from the Internet, or upload a new one using multipart/form-data."""
     caption: Optional[str] = None
     """Audio caption, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the audio caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     duration: Optional[int] = None
     """Duration of the audio in seconds"""
     performer: Optional[str] = None
diff --git a/aiogram/api/methods/send_document.py b/aiogram/api/methods/send_document.py
index 8415aadf..c67588e4 100644
--- a/aiogram/api/methods/send_document.py
+++ b/aiogram/api/methods/send_document.py
@@ -1,6 +1,7 @@
 from typing import Any, Dict, Optional, Union
 
 from ..types import (
+    UNSET,
     ForceReply,
     InlineKeyboardMarkup,
     InputFile,
@@ -39,8 +40,9 @@ class SendDocument(TelegramMethod[Message]):
     caption: Optional[str] = None
     """Document caption (may also be used when resending documents by file_id), 0-1024 characters
     after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the document caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     disable_notification: Optional[bool] = None
     """Sends the message silently. Users will receive a notification with no sound."""
     reply_to_message_id: Optional[int] = None
diff --git a/aiogram/api/methods/send_message.py b/aiogram/api/methods/send_message.py
index 080adfdb..54f0fe37 100644
--- a/aiogram/api/methods/send_message.py
+++ b/aiogram/api/methods/send_message.py
@@ -1,6 +1,7 @@
 from typing import Any, Dict, Optional, Union
 
 from ..types import (
+    UNSET,
     ForceReply,
     InlineKeyboardMarkup,
     Message,
@@ -24,8 +25,9 @@ class SendMessage(TelegramMethod[Message]):
     @channelusername)"""
     text: str
     """Text of the message to be sent, 1-4096 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the message text. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in your bot's message."""
     disable_web_page_preview: Optional[bool] = None
     """Disables link previews for links in this message"""
     disable_notification: Optional[bool] = None
diff --git a/aiogram/api/methods/send_photo.py b/aiogram/api/methods/send_photo.py
index 2b75b815..89a25864 100644
--- a/aiogram/api/methods/send_photo.py
+++ b/aiogram/api/methods/send_photo.py
@@ -1,6 +1,7 @@
 from typing import Any, Dict, Optional, Union
 
 from ..types import (
+    UNSET,
     ForceReply,
     InlineKeyboardMarkup,
     InputFile,
@@ -30,8 +31,9 @@ class SendPhoto(TelegramMethod[Message]):
     caption: Optional[str] = None
     """Photo caption (may also be used when resending photos by file_id), 0-1024 characters after
     entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the photo caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     disable_notification: Optional[bool] = None
     """Sends the message silently. Users will receive a notification with no sound."""
     reply_to_message_id: Optional[int] = None
diff --git a/aiogram/api/methods/send_video.py b/aiogram/api/methods/send_video.py
index 1017b286..f2659348 100644
--- a/aiogram/api/methods/send_video.py
+++ b/aiogram/api/methods/send_video.py
@@ -1,6 +1,7 @@
 from typing import Any, Dict, Optional, Union
 
 from ..types import (
+    UNSET,
     ForceReply,
     InlineKeyboardMarkup,
     InputFile,
@@ -45,8 +46,9 @@ class SendVideo(TelegramMethod[Message]):
     caption: Optional[str] = None
     """Video caption (may also be used when resending videos by file_id), 0-1024 characters after
     entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the video caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     supports_streaming: Optional[bool] = None
     """Pass True, if the uploaded video is suitable for streaming"""
     disable_notification: Optional[bool] = None
diff --git a/aiogram/api/methods/send_voice.py b/aiogram/api/methods/send_voice.py
index 96e2a159..1369ad1c 100644
--- a/aiogram/api/methods/send_voice.py
+++ b/aiogram/api/methods/send_voice.py
@@ -1,6 +1,7 @@
 from typing import Any, Dict, Optional, Union
 
 from ..types import (
+    UNSET,
     ForceReply,
     InlineKeyboardMarkup,
     InputFile,
@@ -33,9 +34,9 @@ class SendVoice(TelegramMethod[Message]):
     Internet, or upload a new one using multipart/form-data."""
     caption: Optional[str] = None
     """Voice message caption, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the voice message caption. See formatting options for more
-    details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     duration: Optional[int] = None
     """Duration of the voice message in seconds"""
     disable_notification: Optional[bool] = None
diff --git a/aiogram/api/types/__init__.py b/aiogram/api/types/__init__.py
index e5020458..3dbb0439 100644
--- a/aiogram/api/types/__init__.py
+++ b/aiogram/api/types/__init__.py
@@ -1,6 +1,6 @@
 from .animation import Animation
 from .audio import Audio
-from .base import TelegramObject
+from .base import UNSET, TelegramObject
 from .bot_command import BotCommand
 from .callback_game import CallbackGame
 from .callback_query import CallbackQuery
@@ -103,6 +103,7 @@ from .webhook_info import WebhookInfo
 __all__ = (
     "TelegramObject",
     "Downloadable",
+    "UNSET",
     "BufferedInputFile",
     "FSInputFile",
     "URLInputFile",
diff --git a/aiogram/api/types/base.py b/aiogram/api/types/base.py
index 8c098202..06618234 100644
--- a/aiogram/api/types/base.py
+++ b/aiogram/api/types/base.py
@@ -1,4 +1,6 @@
 import datetime
+from typing import Any
+from unittest.mock import sentinel
 
 from pydantic import BaseModel, Extra
 
@@ -19,3 +21,7 @@ class TelegramObject(ContextInstanceMixin["TelegramObject"], BaseModel):
 class MutableTelegramObject(TelegramObject):
     class Config:
         allow_mutation = True
+
+
+UNSET: Any = sentinel.UNSET  # special sentinel object which used in sutuation when None might be a useful value
+print(id(UNSET))
diff --git a/aiogram/api/types/inline_query_result_audio.py b/aiogram/api/types/inline_query_result_audio.py
index dd4ed624..687de9f0 100644
--- a/aiogram/api/types/inline_query_result_audio.py
+++ b/aiogram/api/types/inline_query_result_audio.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -32,8 +33,9 @@ class InlineQueryResultAudio(InlineQueryResult):
     """Title"""
     caption: Optional[str] = None
     """Caption, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the audio caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     performer: Optional[str] = None
     """Performer"""
     audio_duration: Optional[int] = None
diff --git a/aiogram/api/types/inline_query_result_cached_audio.py b/aiogram/api/types/inline_query_result_cached_audio.py
index b1b32880..af508b2e 100644
--- a/aiogram/api/types/inline_query_result_cached_audio.py
+++ b/aiogram/api/types/inline_query_result_cached_audio.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -30,8 +31,9 @@ class InlineQueryResultCachedAudio(InlineQueryResult):
     """A valid file identifier for the audio file"""
     caption: Optional[str] = None
     """Caption, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the audio caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_cached_document.py b/aiogram/api/types/inline_query_result_cached_document.py
index 1f377fb7..f9024291 100644
--- a/aiogram/api/types/inline_query_result_cached_document.py
+++ b/aiogram/api/types/inline_query_result_cached_document.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -34,8 +35,9 @@ class InlineQueryResultCachedDocument(InlineQueryResult):
     """Short description of the result"""
     caption: Optional[str] = None
     """Caption of the document to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the document caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_cached_gif.py b/aiogram/api/types/inline_query_result_cached_gif.py
index 228da905..3408a404 100644
--- a/aiogram/api/types/inline_query_result_cached_gif.py
+++ b/aiogram/api/types/inline_query_result_cached_gif.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -30,8 +31,9 @@ class InlineQueryResultCachedGif(InlineQueryResult):
     """Title for the result"""
     caption: Optional[str] = None
     """Caption of the GIF file to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_cached_mpeg4_gif.py b/aiogram/api/types/inline_query_result_cached_mpeg4_gif.py
index 73e9ad2b..71a4e926 100644
--- a/aiogram/api/types/inline_query_result_cached_mpeg4_gif.py
+++ b/aiogram/api/types/inline_query_result_cached_mpeg4_gif.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -31,8 +32,9 @@ class InlineQueryResultCachedMpeg4Gif(InlineQueryResult):
     """Title for the result"""
     caption: Optional[str] = None
     """Caption of the MPEG-4 file to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_cached_photo.py b/aiogram/api/types/inline_query_result_cached_photo.py
index be425a5c..1e7abd57 100644
--- a/aiogram/api/types/inline_query_result_cached_photo.py
+++ b/aiogram/api/types/inline_query_result_cached_photo.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -32,8 +33,9 @@ class InlineQueryResultCachedPhoto(InlineQueryResult):
     """Short description of the result"""
     caption: Optional[str] = None
     """Caption of the photo to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the photo caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_cached_video.py b/aiogram/api/types/inline_query_result_cached_video.py
index 497283e4..b6161679 100644
--- a/aiogram/api/types/inline_query_result_cached_video.py
+++ b/aiogram/api/types/inline_query_result_cached_video.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -32,8 +33,9 @@ class InlineQueryResultCachedVideo(InlineQueryResult):
     """Short description of the result"""
     caption: Optional[str] = None
     """Caption of the video to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the video caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_cached_voice.py b/aiogram/api/types/inline_query_result_cached_voice.py
index c11ecef0..12491b88 100644
--- a/aiogram/api/types/inline_query_result_cached_voice.py
+++ b/aiogram/api/types/inline_query_result_cached_voice.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -32,9 +33,9 @@ class InlineQueryResultCachedVoice(InlineQueryResult):
     """Voice message title"""
     caption: Optional[str] = None
     """Caption, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the voice message caption. See formatting options for more
-    details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_document.py b/aiogram/api/types/inline_query_result_document.py
index 207345de..0c66579c 100644
--- a/aiogram/api/types/inline_query_result_document.py
+++ b/aiogram/api/types/inline_query_result_document.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -35,8 +36,9 @@ class InlineQueryResultDocument(InlineQueryResult):
     """Mime type of the content of the file, either 'application/pdf' or 'application/zip'"""
     caption: Optional[str] = None
     """Caption of the document to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the document caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     description: Optional[str] = None
     """Short description of the result"""
     reply_markup: Optional[InlineKeyboardMarkup] = None
diff --git a/aiogram/api/types/inline_query_result_gif.py b/aiogram/api/types/inline_query_result_gif.py
index e428225b..1285b96f 100644
--- a/aiogram/api/types/inline_query_result_gif.py
+++ b/aiogram/api/types/inline_query_result_gif.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -38,8 +39,9 @@ class InlineQueryResultGif(InlineQueryResult):
     """Title for the result"""
     caption: Optional[str] = None
     """Caption of the GIF file to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_mpeg4_gif.py b/aiogram/api/types/inline_query_result_mpeg4_gif.py
index 139dbb30..4fa6a8e9 100644
--- a/aiogram/api/types/inline_query_result_mpeg4_gif.py
+++ b/aiogram/api/types/inline_query_result_mpeg4_gif.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -39,8 +40,9 @@ class InlineQueryResultMpeg4Gif(InlineQueryResult):
     """Title for the result"""
     caption: Optional[str] = None
     """Caption of the MPEG-4 file to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_photo.py b/aiogram/api/types/inline_query_result_photo.py
index e44b63c8..5927c62c 100644
--- a/aiogram/api/types/inline_query_result_photo.py
+++ b/aiogram/api/types/inline_query_result_photo.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -38,8 +39,9 @@ class InlineQueryResultPhoto(InlineQueryResult):
     """Short description of the result"""
     caption: Optional[str] = None
     """Caption of the photo to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the photo caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     reply_markup: Optional[InlineKeyboardMarkup] = None
     """Inline keyboard attached to the message"""
     input_message_content: Optional[InputMessageContent] = None
diff --git a/aiogram/api/types/inline_query_result_video.py b/aiogram/api/types/inline_query_result_video.py
index a025fc4e..5ea390ed 100644
--- a/aiogram/api/types/inline_query_result_video.py
+++ b/aiogram/api/types/inline_query_result_video.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -36,8 +37,9 @@ class InlineQueryResultVideo(InlineQueryResult):
     """Title for the result"""
     caption: Optional[str] = None
     """Caption of the video to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the video caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     video_width: Optional[int] = None
     """Video width"""
     video_height: Optional[int] = None
diff --git a/aiogram/api/types/inline_query_result_voice.py b/aiogram/api/types/inline_query_result_voice.py
index 161eafe8..74d17448 100644
--- a/aiogram/api/types/inline_query_result_voice.py
+++ b/aiogram/api/types/inline_query_result_voice.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional
 
 from pydantic import Field
 
+from .base import UNSET
 from .inline_query_result import InlineQueryResult
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -33,9 +34,9 @@ class InlineQueryResultVoice(InlineQueryResult):
     """Recording title"""
     caption: Optional[str] = None
     """Caption, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the voice message caption. See formatting options for more
-    details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     voice_duration: Optional[int] = None
     """Recording duration in seconds"""
     reply_markup: Optional[InlineKeyboardMarkup] = None
diff --git a/aiogram/api/types/input_media_animation.py b/aiogram/api/types/input_media_animation.py
index 17523135..e62dc95e 100644
--- a/aiogram/api/types/input_media_animation.py
+++ b/aiogram/api/types/input_media_animation.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional, Union
 
 from pydantic import Field
 
+from .base import UNSET
 from .input_media import InputMedia
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -33,9 +34,9 @@ class InputMediaAnimation(InputMedia):
     multipart/form-data under <file_attach_name>."""
     caption: Optional[str] = None
     """Caption of the animation to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the animation caption. See formatting options for more
-    details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     width: Optional[int] = None
     """Animation width"""
     height: Optional[int] = None
diff --git a/aiogram/api/types/input_media_audio.py b/aiogram/api/types/input_media_audio.py
index 37162374..40059bd9 100644
--- a/aiogram/api/types/input_media_audio.py
+++ b/aiogram/api/types/input_media_audio.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional, Union
 
 from pydantic import Field
 
+from .base import UNSET
 from .input_media import InputMedia
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -33,8 +34,9 @@ class InputMediaAudio(InputMedia):
     multipart/form-data under <file_attach_name>."""
     caption: Optional[str] = None
     """Caption of the audio to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the audio caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     duration: Optional[int] = None
     """Duration of the audio in seconds"""
     performer: Optional[str] = None
diff --git a/aiogram/api/types/input_media_document.py b/aiogram/api/types/input_media_document.py
index a3237906..d57f1178 100644
--- a/aiogram/api/types/input_media_document.py
+++ b/aiogram/api/types/input_media_document.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional, Union
 
 from pydantic import Field
 
+from .base import UNSET
 from .input_media import InputMedia
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -33,5 +34,6 @@ class InputMediaDocument(InputMedia):
     multipart/form-data under <file_attach_name>."""
     caption: Optional[str] = None
     """Caption of the document to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the document caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
diff --git a/aiogram/api/types/input_media_photo.py b/aiogram/api/types/input_media_photo.py
index 529a5bc9..c92b45e4 100644
--- a/aiogram/api/types/input_media_photo.py
+++ b/aiogram/api/types/input_media_photo.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional, Union
 
 from pydantic import Field
 
+from .base import UNSET
 from .input_media import InputMedia
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -26,5 +27,6 @@ class InputMediaPhoto(InputMedia):
     <file_attach_name> name."""
     caption: Optional[str] = None
     """Caption of the photo to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the photo caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
diff --git a/aiogram/api/types/input_media_video.py b/aiogram/api/types/input_media_video.py
index 6af1b68c..61e73c1e 100644
--- a/aiogram/api/types/input_media_video.py
+++ b/aiogram/api/types/input_media_video.py
@@ -4,6 +4,7 @@ from typing import TYPE_CHECKING, Optional, Union
 
 from pydantic import Field
 
+from .base import UNSET
 from .input_media import InputMedia
 
 if TYPE_CHECKING:  # pragma: no cover
@@ -33,8 +34,9 @@ class InputMediaVideo(InputMedia):
     multipart/form-data under <file_attach_name>."""
     caption: Optional[str] = None
     """Caption of the video to be sent, 0-1024 characters after entities parsing"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the video caption. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in the media caption."""
     width: Optional[int] = None
     """Video width"""
     height: Optional[int] = None
diff --git a/aiogram/api/types/input_text_message_content.py b/aiogram/api/types/input_text_message_content.py
index 2a8257cd..3c5bda13 100644
--- a/aiogram/api/types/input_text_message_content.py
+++ b/aiogram/api/types/input_text_message_content.py
@@ -2,6 +2,7 @@ from __future__ import annotations
 
 from typing import Optional
 
+from .base import UNSET
 from .input_message_content import InputMessageContent
 
 
@@ -14,7 +15,8 @@ class InputTextMessageContent(InputMessageContent):
 
     message_text: str
     """Text of the message to be sent, 1-4096 characters"""
-    parse_mode: Optional[str] = None
-    """Mode for parsing entities in the message text. See formatting options for more details."""
+    parse_mode: Optional[str] = UNSET
+    """Send Markdown or HTML, if you want Telegram apps to show bold, italic, fixed-width text or
+    inline URLs in your bot's message."""
     disable_web_page_preview: Optional[bool] = None
     """Disables link previews for links in the sent message"""
diff --git a/tests/test_api/test_methods/test_base.py b/tests/test_api/test_methods/test_base.py
index c32a075b..e3627d54 100644
--- a/tests/test_api/test_methods/test_base.py
+++ b/tests/test_api/test_methods/test_base.py
@@ -59,4 +59,4 @@ class TestPrepareParseMode:
     def test_bot_not_in_context(self):
         data = {}
         prepare_parse_mode(data)
-        assert "parse_mode" not in data
+        assert data["parse_mode"] is None