diff --git a/src/mcp/client/sse.py b/src/mcp/client/sse.py
index 4f6241a7..2cec70aa 100644
--- a/src/mcp/client/sse.py
+++ b/src/mcp/client/sse.py
@@ -119,6 +119,7 @@ async def post_writer(endpoint_url: str):
                                             by_alias=True,
                                             mode="json",
                                             exclude_none=True,
+                                            timeout=httpx.Timeout(timeout, read=sse_read_timeout),
                                         ),
                                     )
                                     response.raise_for_status()