diff --git a/README.md b/README.md
index 557e42f..801c43b 100644
--- a/README.md
+++ b/README.md
@@ -6,14 +6,24 @@ because I wasn't satisfied by simplicity and usage of other libraries. So
 this library does not aim to be "the best matrix bot library", it only aims to
 be good enough for me.
 
+## Features
+
+The package supports the following features:
+- **Filter-based callback system**
+- **Images sending**
+- **Videos sending with automatic thumbnail generation (requires `ffmpeg`)**
+
 ## Installation
 
 Use `pip` to install this package:
 
 ```bash
-python -m pip install git+https://git.tyukalov.su/nikita/mab
+python -m pip install git+https://git.tyukalov.su/nikita/mab@v0.3.0
 ```
 
+You should specify package version you want to use, because `main` without tags
+contain unstable code.
+
 ## Basic usage
 
 This is the most simple bot you can create. It would respond to any message
@@ -23,21 +33,16 @@ that starts with `!test`, `!hello` or `!hi`.
 import asyncio
 from mab import MatrixBot, MatrixBotConfig
 from mab import TextCommandFilter
+from mab.types import RoomEventData
 
-from nio import MatrixRoom, MatrixMessageText
-
-bot: MatrixBot
-
-async def on_valid_command(room: MatrixRoom, event: RoomMessageText) -> None:
-    global bot
+async def on_valid_command(data: RoomEventData) -> None:
     # do not respond to ourselves
-    if event.sender == bot.get_client().user_id:
+    if event.sender == data.bot.get_client().user_id:
         return
-    text = f"Your message contains {len(event.body)} symbols"
-    await bot.send_text_to_room(room.room_id, text)
+    text = f"Your message contains {len(data.event.body)} symbols"
+    await data.bot.send_text_to_room(data.room, text)
 
 async def main() -> None:
-    global bot
     # create and start the bot
     cfg = MatrixBotConfig(
         matrix_homeserver_url="matrix.domain.su",
@@ -45,11 +50,11 @@ async def main() -> None:
         storage_directory=Path("storage_nagibator666")
     )
     bot = MatrixBot(matrix_bot_config)
-    bot.add_event_callback(
-        on_valid_command,
-        TextCommandFilter(["test", "hello", "hi"])
+    bot.add_callback(
+        TextCommandFilter(["test", "hello", "hi"]),
+        on_valid_command
     )
-    bot.start()
+    await bot.start()
     # wait for Ctrl+C
     try:
         while True:
diff --git a/pyproject.toml b/pyproject.toml
index 4cb2cf9..31e453a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "mab"
-version = "0.2.0"
+version = "0.3.0"
 authors = [
     { name = "Tyukalov Nikita", email = "nikita@tyukalov.su" }
 ]