diff --git a/.github/workflows/lint-test.yml b/.github/workflows/lint-test.yml
index ff7b3e3..3cb4ebb 100644
--- a/.github/workflows/lint-test.yml
+++ b/.github/workflows/lint-test.yml
@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python_version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python_version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
     steps:
       - uses: actions/checkout@v4
       - name: Set up Python
@@ -38,7 +38,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python_version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+        python_version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
         os: ["ubuntu-latest", "windows-latest"]
     steps:
       - uses: actions/checkout@v4
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b640f5b..39230cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - [#30](https://github.com/WSH032/fastapi-proxy-lib/pull/30) - fix(internal): use `websocket` in favor of `websocket_route`. Thanks [@WSH032](https://github.com/WSH032)!
 
+### Removed
+
+- [#49](https://github.com/WSH032/fastapi-proxy-lib/pull/49) - Drop support for `Python 3.8`.
+
+### Fixed
+
+- [#49](https://github.com/WSH032/fastapi-proxy-lib/pull/49) - fix!: bump `httpx-ws >= 0.7.1` to fix frankie567/httpx-ws#29. Thanks [@WSH032](https://github.com/WSH032)!
+
 ### Internal
 
 - [#47](https://github.com/WSH032/fastapi-proxy-lib/pull/47) - test: do not use deprecated and removed APIs of httpx. Thanks [@WSH032](https://github.com/WSH032)!
diff --git a/pyproject.toml b/pyproject.toml
index d663107..1b52408 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 # https://hatch.pypa.io/latest/config/metadata/
 [project]
 name = "fastapi-proxy-lib"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 readme = "README.md"
 license = { file = "LICENSE" }
 authors = [
@@ -29,11 +29,11 @@ classifiers = [
     "License :: OSI Approved :: Apache Software License",
     "Operating System :: OS Independent",
     "Intended Audience :: Developers",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3 :: Only",
     "Topic :: Internet :: WWW/HTTP :: HTTP Servers",
     "Topic :: Internet :: WWW/HTTP :: Session",
@@ -50,7 +50,7 @@ dynamic = ["version"]
 
 dependencies = [
     "httpx",
-    "httpx-ws >= 0.4.2",
+    "httpx-ws >= 0.7.1",
     "starlette",
     "typing_extensions >=4.5.0",
 ]
@@ -202,7 +202,7 @@ convention = "google"
 # https://microsoft.github.io/pyright/#/configuration
 [tool.pyright]
 typeCheckingMode = "strict"
-pythonVersion = "3.8"
+pythonVersion = "3.9"
 reportUnusedImport = "warning"
 reportUnusedFunction = "warning"
 reportUnusedExpression = "warning"
diff --git a/scripts/pre_commit_scripts/ver_sync.py b/scripts/pre_commit_scripts/ver_sync.py
index 511f026..9e4cca6 100644
--- a/scripts/pre_commit_scripts/ver_sync.py
+++ b/scripts/pre_commit_scripts/ver_sync.py
@@ -13,8 +13,6 @@
 from pathlib import Path
 from typing import (
     Any,
-    Dict,
-    List,
     Union,
 )
 
@@ -30,13 +28,13 @@
 pre_commit_config_yaml_path = Path(".pre-commit-config.yaml")
 pyproject_toml_path = Path("pyproject.toml")
 
-RepoType = Dict[str, Any]
-HookType = Dict[str, Any]
+RepoType = dict[str, Any]
+HookType = dict[str, Any]
 
 if __name__ == "__main__":
     # NOTE: 这三个键名应该对应
     # pyproject_toml["tool"]["hatch"]["envs"]["default"]["dependencies"] 里的值
-    vers_in_pre_commit: Dict[str, Union[None, str]] = {
+    vers_in_pre_commit: dict[str, Union[None, str]] = {
         "ruff": None,
         "black": None,
         "codespell": None,
@@ -44,10 +42,10 @@
 
     # 找出pre-commit-config.yaml中的版本
     pre_commit_yaml = yaml.load(pre_commit_config_yaml_path)
-    repos_lst: List[RepoType] = pre_commit_yaml["repos"]
+    repos_lst: list[RepoType] = pre_commit_yaml["repos"]
 
     for repo in repos_lst:
-        hooks_lst: List[HookType] = repo["hooks"]
+        hooks_lst: list[HookType] = repo["hooks"]
         hook = hooks_lst[0]  # 特殊标记的只有一个hook
         hook_alias = hook.get("alias")  # 只有特殊标记的才有alias
         if hook_alias is None:
@@ -56,7 +54,7 @@
             vers_in_pre_commit[hook_alias] = repo["rev"]
 
     # 检查是否正确
-    new_vers: Dict[str, Version] = {}
+    new_vers: dict[str, Version] = {}
     for name, ver in vers_in_pre_commit.items():
         if not isinstance(ver, str):
             sys.exit(f"Error: version of `{name}` not found in pre-commit-config.yaml")
diff --git a/src/fastapi_proxy_lib/core/_tool.py b/src/fastapi_proxy_lib/core/_tool.py
index 5b3d014..8f33b2b 100644
--- a/src/fastapi_proxy_lib/core/_tool.py
+++ b/src/fastapi_proxy_lib/core/_tool.py
@@ -3,12 +3,11 @@
 import ipaddress
 import logging
 import warnings
+from collections.abc import Iterable, Mapping
 from functools import lru_cache
 from textwrap import dedent
 from typing import (
     Any,
-    Iterable,
-    Mapping,
     Optional,
     Protocol,
     TypedDict,
diff --git a/src/fastapi_proxy_lib/core/http.py b/src/fastapi_proxy_lib/core/http.py
index fab3316..6f73d36 100644
--- a/src/fastapi_proxy_lib/core/http.py
+++ b/src/fastapi_proxy_lib/core/http.py
@@ -4,7 +4,6 @@
 from textwrap import dedent
 from typing import (
     Any,
-    List,
     NamedTuple,
     NoReturn,
     Optional,
@@ -185,7 +184,7 @@ def _change_server_header(
     Returns:
         The **oringinal headers**, but **had been changed**.
     """
-    server_connection_header: List[str] = [
+    server_connection_header: list[str] = [
         v.strip() for v in headers.get("connection", "").lower().split(",")
     ]
 
diff --git a/src/fastapi_proxy_lib/core/websocket.py b/src/fastapi_proxy_lib/core/websocket.py
index 36dacd7..48c88b7 100644
--- a/src/fastapi_proxy_lib/core/websocket.py
+++ b/src/fastapi_proxy_lib/core/websocket.py
@@ -6,7 +6,6 @@
 from typing import (
     TYPE_CHECKING,
     Any,
-    List,
     Literal,
     NamedTuple,
     NoReturn,
@@ -80,7 +79,7 @@ class _ClientServerProxyTask(NamedTuple):
 _change_client_header = change_necessary_client_header_for_httpx
 
 
-def _get_client_request_subprotocols(ws_scope: Scope) -> Union[List[str], None]:
+def _get_client_request_subprotocols(ws_scope: Scope) -> Union[list[str], None]:
     """Get client request subprotocols.
 
     Args:
@@ -91,7 +90,7 @@ def _get_client_request_subprotocols(ws_scope: Scope) -> Union[List[str], None]:
         Else return `None`.
     """
     # https://asgi.readthedocs.io/en/latest/specs/www.html#websocket-connection-scope
-    subprotocols: List[str] = ws_scope.get("subprotocols", [])
+    subprotocols: list[str] = ws_scope.get("subprotocols", [])
     if not subprotocols:  # 即为 []
         return None
     return subprotocols
@@ -484,7 +483,7 @@ async def send_request_to_target(  # pyright: ignore [reportIncompatibleMethodOv
         keepalive_ping_interval_seconds = self.keepalive_ping_interval_seconds
         keepalive_ping_timeout_seconds = self.keepalive_ping_timeout_seconds
 
-        client_request_subprotocols: Union[List[str], None] = (
+        client_request_subprotocols: Union[list[str], None] = (
             _get_client_request_subprotocols(websocket.scope)
         )
 
diff --git a/src/fastapi_proxy_lib/fastapi/router.py b/src/fastapi_proxy_lib/fastapi/router.py
index 076f69d..3dd8eb6 100644
--- a/src/fastapi_proxy_lib/fastapi/router.py
+++ b/src/fastapi_proxy_lib/fastapi/router.py
@@ -5,15 +5,13 @@
 
 import asyncio
 import warnings
-from contextlib import asynccontextmanager
+from collections.abc import AsyncIterator
+from contextlib import AbstractAsyncContextManager, asynccontextmanager
 from typing import (
     Any,
-    AsyncContextManager,
-    AsyncIterator,
     Callable,
     Literal,
     Optional,
-    Set,
     TypeVar,
     Union,
 )
@@ -170,13 +168,13 @@ class RouterHelper:
 
     def __init__(self) -> None:
         """Initialize RouterHelper."""
-        self._registered_proxy: Set[Union[_HttpProxyTypes, _WebSocketProxyTypes]] = (
+        self._registered_proxy: set[Union[_HttpProxyTypes, _WebSocketProxyTypes]] = (
             set()
         )
-        self._registered_router_id: Set[int] = set()
+        self._registered_router_id: set[int] = set()
 
     @property
-    def registered_proxy(self) -> Set[Union[_HttpProxyTypes, _WebSocketProxyTypes]]:
+    def registered_proxy(self) -> set[Union[_HttpProxyTypes, _WebSocketProxyTypes]]:
         """The proxy that has been registered."""
         return self._registered_proxy
 
@@ -253,7 +251,7 @@ def register_router(
         self._registered_proxy.add(proxy)
         return router
 
-    def get_lifespan(self) -> Callable[..., AsyncContextManager[None]]:
+    def get_lifespan(self) -> Callable[..., AbstractAsyncContextManager[None]]:
         """The lifespan event for closing registered proxy.
 
         Returns:
diff --git a/tests/app/echo_http_app.py b/tests/app/echo_http_app.py
index f3d3012..5989dd0 100644
--- a/tests/app/echo_http_app.py
+++ b/tests/app/echo_http_app.py
@@ -2,7 +2,8 @@
 # pyright: reportUnusedFunction=false
 
 import io
-from typing import Literal, Mapping, Union
+from collections.abc import Mapping
+from typing import Literal, Union
 
 from fastapi import FastAPI, Request, Response
 from fastapi.responses import StreamingResponse
diff --git a/tests/app/tool.py b/tests/app/tool.py
index c740478..454bc55 100644
--- a/tests/app/tool.py
+++ b/tests/app/tool.py
@@ -3,7 +3,7 @@
 import asyncio
 import socket
 from dataclasses import dataclass
-from typing import Any, Callable, List, Optional, Type, TypedDict, TypeVar, Union
+from typing import Any, Callable, Optional, TypedDict, TypeVar, Union
 
 import httpx
 import uvicorn
@@ -12,7 +12,7 @@
 from starlette.websockets import WebSocket
 from typing_extensions import Self, override
 
-_Decoratable_T = TypeVar("_Decoratable_T", bound=Union[Callable[..., Any], Type[Any]])
+_Decoratable_T = TypeVar("_Decoratable_T", bound=Union[Callable[..., Any], type[Any]])
 
 ServerRecvRequestsTypes = Union[Request, WebSocket]
 
@@ -100,7 +100,7 @@ def __init__(
         self.contx_exit_timeout = contx_exit_timeout
 
     @override
-    async def startup(self, sockets: Optional[List[socket.socket]] = None) -> None:
+    async def startup(self, sockets: Optional[list[socket.socket]] = None) -> None:
         """The same as `uvicorn.Server.startup`."""
         super_return = await super().startup(sockets=sockets)
         self.contx_server_started_event.set()
diff --git a/tests/conftest.py b/tests/conftest.py
index 0527101..0a96842 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -8,12 +8,11 @@
 # https://anyio.readthedocs.io/en/stable/testing.html
 
 import typing
+from collections.abc import AsyncIterator, Coroutine
 from contextlib import AsyncExitStack
 from dataclasses import dataclass
 from typing import (
-    AsyncIterator,
     Callable,
-    Coroutine,
     Literal,
     Protocol,
     Union,
diff --git a/tests/test_docs_examples.py b/tests/test_docs_examples.py
index 12bea06..848084e 100644
--- a/tests/test_docs_examples.py
+++ b/tests/test_docs_examples.py
@@ -3,8 +3,8 @@
 
 def test_forward_http_proxy() -> None:
     """测试 ForwardHttpProxy 中的例子."""
+    from collections.abc import AsyncIterator
     from contextlib import asynccontextmanager
-    from typing import AsyncIterator
 
     from fastapi import FastAPI
     from fastapi_proxy_lib.core.http import ForwardHttpProxy
@@ -33,8 +33,8 @@ async def _(request: Request, path: str = ""):
 
 def test_reverse_http_proxy() -> None:
     """测试 ReverseHttpProxy 中的例子."""
+    from collections.abc import AsyncIterator
     from contextlib import asynccontextmanager
-    from typing import AsyncIterator
 
     from fastapi import FastAPI
     from fastapi_proxy_lib.core.http import ReverseHttpProxy
@@ -71,8 +71,8 @@ async def _(request: Request, path: str = ""):
 
 def test_reverse_ws_proxy() -> None:
     """测试 ReverseWebSocketProxy 中的例子."""
+    from collections.abc import AsyncIterator
     from contextlib import asynccontextmanager
-    from typing import AsyncIterator
 
     from fastapi import FastAPI
     from fastapi_proxy_lib.core.websocket import ReverseWebSocketProxy
diff --git a/tests/test_ws.py b/tests/test_ws.py
index ae66dbc..6f95f1a 100644
--- a/tests/test_ws.py
+++ b/tests/test_ws.py
@@ -4,7 +4,7 @@
 import asyncio
 from contextlib import AsyncExitStack
 from multiprocessing import Process, Queue
-from typing import Any, Dict, Literal, Optional
+from typing import Any, Literal, Optional
 
 import httpx
 import httpx_ws
@@ -34,7 +34,7 @@
 WS_BACKENDS_NEED_BE_TESTED = ("websockets",)
 
 # https://www.python-httpx.org/advanced/transports/#no-proxy-support
-NO_PROXIES: Dict[Any, Any] = {"all://": None}
+NO_PROXIES: dict[Any, Any] = {"all://": None}
 
 
 def _subprocess_run_echo_ws_uvicorn_server(queue: "Queue[str]", **kwargs: Any):
@@ -68,8 +68,8 @@ async def run():
 
 def _subprocess_run_httpx_ws(
     queue: "Queue[str]",
-    kwargs_async_client: Optional[Dict[str, Any]] = None,
-    kwargs_aconnect_ws: Optional[Dict[str, Any]] = None,
+    kwargs_async_client: Optional[dict[str, Any]] = None,
+    kwargs_aconnect_ws: Optional[dict[str, Any]] = None,
 ):
     """Run aconnect_ws in subprocess.