diff --git a/python/packages/autogen-ext/src/autogen_ext/code_executors/jupyter/_jupyter_client.py b/python/packages/autogen-ext/src/autogen_ext/code_executors/jupyter/_jupyter_client.py
index b8ae4058c992..874010c9a2c5 100644
--- a/python/packages/autogen-ext/src/autogen_ext/code_executors/jupyter/_jupyter_client.py
+++ b/python/packages/autogen-ext/src/autogen_ext/code_executors/jupyter/_jupyter_client.py
@@ -52,11 +52,15 @@ def _get_ws_base_url(self) -> str:
         return f"ws://{self._connection_info.host}{port}"
 
     def list_kernel_specs(self) -> dict[str, dict[str, str]]:
-        response = self._session.get(f"{self._get_api_base_url()}/api/kernelspecs", headers=self._get_headers())
+        response = self._session.get(
+            f"{self._get_api_base_url()}/api/kernelspecs", headers=self._get_headers()
+        )
         return cast(dict[str, dict[str, str]], response.json())
 
     def list_kernels(self) -> list[dict[str, str]]:
-        response = self._session.get(f"{self._get_api_base_url()}/api/kernels", headers=self._get_headers())
+        response = self._session.get(
+            f"{self._get_api_base_url()}/api/kernels", headers=self._get_headers()
+        )
         return cast(list[dict[str, str]], response.json())
 
     def start_kernel(self, kernel_spec_name: str) -> str:
@@ -78,13 +82,15 @@ def start_kernel(self, kernel_spec_name: str) -> str:
 
     def delete_kernel(self, kernel_id: str) -> None:
         response = self._session.delete(
-            f"{self._get_api_base_url()}/api/kernels/{kernel_id}", headers=self._get_headers()
+            f"{self._get_api_base_url()}/api/kernels/{kernel_id}",
+            headers=self._get_headers(),
         )
         response.raise_for_status()
 
     def restart_kernel(self, kernel_id: str) -> None:
         response = self._session.post(
-            f"{self._get_api_base_url()}/api/kernels/{kernel_id}/restart", headers=self._get_headers()
+            f"{self._get_api_base_url()}/api/kernels/{kernel_id}/restart",
+            headers=self._get_headers(),
         )
         response.raise_for_status()
 
@@ -92,7 +98,14 @@ async def get_kernel_client(self, kernel_id: str) -> JupyterKernelClient:
         ws_url = f"{self._get_ws_base_url()}/api/kernels/{kernel_id}/channels"
         headers = self._get_headers()
         headers["Cookie"] = self._get_cookies()
-        websocket = await connect(ws_url, additional_headers=headers)
+        websocket = await connect(
+            ws_url,
+            additional_headers=headers,
+            max_size=2**24,
+            open_timeout=120,
+            ping_timeout=30,
+            close_timeout=30,
+        )
         return JupyterKernelClient(websocket)
 
 
@@ -114,7 +127,9 @@ def __init__(self, websocket: ClientConnection):
         self._session_id: str = uuid.uuid4().hex
         self._websocket = websocket
 
-    async def _send_message(self, *, content: dict[str, Any], channel: str, message_type: str) -> str:
+    async def _send_message(
+        self, *, content: dict[str, Any], channel: str, message_type: str
+    ) -> str:
         timestamp = datetime.datetime.now().isoformat()
         message_id = uuid.uuid4().hex
         message = {
@@ -136,7 +151,9 @@ async def _send_message(self, *, content: dict[str, Any], channel: str, message_
         return message_id
 
     async def wait_for_ready(self) -> None:
-        message_id = await self._send_message(content={}, channel="shell", message_type="kernel_info_request")
+        message_id = await self._send_message(
+            content={}, channel="shell", message_type="kernel_info_request"
+        )
 
         async for message in self._receive_message(message_id):
             if message["msg_type"] == "kernel_info_reply":
@@ -167,8 +184,14 @@ async def execute(self, code: str) -> ExecutionResult:
                         match data_type:
                             case "text/plain":
                                 text_output.append(data)
-                            case type if type.startswith("image/") or type == "text/html":
-                                data_output.append(self.ExecutionResult.DataItem(mime_type=data_type, data=data))
+                            case type if type.startswith(
+                                "image/"
+                            ) or type == "text/html":
+                                data_output.append(
+                                    self.ExecutionResult.DataItem(
+                                        mime_type=data_type, data=data
+                                    )
+                                )
                             case _:
                                 text_output.append(json.dumps(data))
                 case "stream":
@@ -186,14 +209,19 @@ async def execute(self, code: str) -> ExecutionResult:
                 break
 
         return JupyterKernelClient.ExecutionResult(
-            is_ok=True, output="\n".join([output for output in text_output]), data_items=data_output
+            is_ok=True,
+            output="\n".join([output for output in text_output]),
+            data_items=data_output,
         )
 
     async def __aenter__(self) -> Self:
         return self
 
     async def __aexit__(
-        self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: TracebackType | None
+        self,
+        exc_type: type[BaseException] | None,
+        exc_val: BaseException | None,
+        exc_tb: TracebackType | None,
     ) -> None:
         await self._websocket.close()
 
diff --git a/python/packages/autogen-ext/tests/code_executors/test_jupyter_code_executor.py b/python/packages/autogen-ext/tests/code_executors/test_jupyter_code_executor.py
index 43430cb878e2..578e8a3bebb3 100644
--- a/python/packages/autogen-ext/tests/code_executors/test_jupyter_code_executor.py
+++ b/python/packages/autogen-ext/tests/code_executors/test_jupyter_code_executor.py
@@ -3,7 +3,6 @@
 from pathlib import Path
 
 import pytest
-import websockets
 from autogen_core import CancellationToken
 from autogen_core.code_executor import CodeBlock
 from autogen_ext.code_executors.jupyter import JupyterCodeExecutor, JupyterCodeResult, LocalJupyterServer