diff --git a/pyproject.toml b/pyproject.toml
index 029a9c39..54e5882f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,9 +29,7 @@ description = "A blazing-fast Python HTTP client with TLS fingerprint"
 readme = "README.md"
 dynamic = ["version"]
 license = { text = "GPL-3.0" }
-authors = [
-    { name = "0x676e67", email = "gngppz@gmail.com" }
-]
+authors = [{ name = "0x676e67", email = "gngppz@gmail.com" }]
 keywords = ["http", "client", "websocket", "ja3", "ja4"]
 
 [tool.maturin]
@@ -43,7 +41,5 @@ Documentation = "https://github.com/0x676e67/rnet/blob/main/rnet.pyi"
 Homepage = "https://github.com/0x676e67/rnet"
 Repository = "https://github.com/0x676e67/rnet"
 
-[tool.poetry.dev-dependencies]
-pytest = "^8.3.4"
-pytest-asyncio = "^0.25.3"
-pytest-rerunfailures = "^15.0"
\ No newline at end of file
+[dependency-groups]
+dev = ["pytest>=8.3.4", "pytest-asyncio>=0.25.3", "pytest-rerunfailures>=15.0"]
diff --git a/src/async_impl/client.rs b/src/async_impl/client.rs
index 26e08814..fa0c650b 100644
--- a/src/async_impl/client.rs
+++ b/src/async_impl/client.rs
@@ -16,7 +16,7 @@ use std::{net::IpAddr, ops::Deref};
 
 /// A client for making HTTP requests.
 #[gen_stub_pyclass]
-#[pyclass]
+#[pyclass(subclass)]
 pub struct Client(rquest::Client);
 
 impl Deref for Client {
diff --git a/src/blocking/client.rs b/src/blocking/client.rs
index a909168f..c0c30358 100644
--- a/src/blocking/client.rs
+++ b/src/blocking/client.rs
@@ -9,7 +9,7 @@ use pyo3_stub_gen::derive::{gen_stub_pyclass, gen_stub_pymethods};
 
 /// A blocking client for making HTTP requests.
 #[gen_stub_pyclass]
-#[pyclass]
+#[pyclass(subclass)]
 pub struct BlockingClient(async_impl::Client);
 
 macro_rules! define_http_method {
diff --git a/tests/client_test.py b/tests/client_test.py
index 96f0bf7b..97c482ab 100644
--- a/tests/client_test.py
+++ b/tests/client_test.py
@@ -1,6 +1,33 @@
 import pytest
 import rnet
-from rnet import Impersonate, ImpersonateOS, Cookie
+from rnet import Cookie, Impersonate, ImpersonateOS
+
+
+@pytest.mark.asyncio
+@pytest.mark.flaky(reruns=1, reruns_delay=2)
+async def test_inherit_client():
+    class SubClient(rnet.Client):
+        def __init__(self, **kwargs):
+            self.test_var = "test"
+            self.cookie_jar = None
+
+    client = SubClient(impersonate=Impersonate.Chrome133)
+    url = "https://google.com"
+    response = await client.get(url)
+    text = await response.text()
+    assert text is not None
+    assert client.cookie_jar is None
+    assert client.test_var == "test"
+    client.update(
+        impersonate=Impersonate.Firefox135,
+        impersonate_os=ImpersonateOS.Windows,
+        Impersonate_skip_headers=False,
+    )
+    assert (
+        client.user_agent
+        == "Mozilla/5.0 (Windows NT 10.0; rv:135.0) Gecko/20100101 Firefox/135.0"
+    )
+    assert client.test_var == "test"
 
 
 @pytest.mark.asyncio