diff --git a/langchain_mcp_adapters/sessions.py b/langchain_mcp_adapters/sessions.py
index a8af8a5..60172bc 100644
--- a/langchain_mcp_adapters/sessions.py
+++ b/langchain_mcp_adapters/sessions.py
@@ -140,10 +140,10 @@ class StreamableHttpConnection(TypedDict):
     headers: NotRequired[dict[str, Any] | None]
     """HTTP headers to send to the endpoint."""
 
-    timeout: NotRequired[timedelta]
+    timeout: NotRequired[float | timedelta]
     """HTTP timeout."""
 
-    sse_read_timeout: NotRequired[timedelta]
+    sse_read_timeout: NotRequired[float | timedelta]
     """How long (in seconds) the client will wait for a new event before disconnecting.
     All other HTTP operations are controlled by `timeout`."""
 
diff --git a/pyproject.toml b/pyproject.toml
index b77cf8d..fd96300 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ readme = "README.md"
 requires-python = ">=3.10"
 dependencies = [
     "langchain-core>=0.3.36,<0.4",
-    "mcp>=1.9.2",
+    "mcp==1.9.2",
     "typing-extensions>=4.14.0",
 ]
 
diff --git a/tests/test_tools.py b/tests/test_tools.py
index 42ab8b4..9fe2fa9 100644
--- a/tests/test_tools.py
+++ b/tests/test_tools.py
@@ -1,10 +1,12 @@
 from typing import Annotated
 from unittest.mock import AsyncMock, MagicMock
 
+import httpx
 import pytest
 from langchain_core.callbacks import CallbackManagerForToolRun
 from langchain_core.messages import ToolMessage
 from langchain_core.tools import BaseTool, InjectedToolArg, ToolException, tool
+from mcp.server import FastMCP
 from mcp.types import (
     CallToolResult,
     EmbeddedResource,
@@ -368,10 +370,8 @@ def get_status() -> str:
 
 
 # Tests for httpx_client_factory functionality
-@pytest.mark.asyncio
 async def test_load_mcp_tools_with_custom_httpx_client_factory(socket_enabled) -> None:
     """Test load mcp tools with custom httpx client factory."""
-    import httpx
 
     # Custom httpx client factory
     def custom_httpx_client_factory(
@@ -423,7 +423,17 @@ def get_info() -> str:
     return server
 
 
-@pytest.mark.asyncio
+def _create_failing_server() -> FastMCP:
+    server = FastMCP(port=8184)
+
+    @server.tool()
+    def failing_tool(message: str) -> str:
+        """A tool that always fails with an exception"""
+        raise ValueError(f"Tool failed: {message}")
+
+    return server
+
+
 async def test_load_mcp_tools_with_custom_httpx_client_factory_sse(
     socket_enabled,
 ) -> None:
@@ -468,3 +478,28 @@ def custom_httpx_client_factory(
             # Expected to fail since server doesn't have SSE endpoint,
             # but the important thing is that httpx_client_factory was passed correctly
             pass
+
+
+async def test_mcp_tool_exception_handling(socket_enabled) -> None:
+    """Test that exceptions from MCP tools are properly handled on the client side."""
+    with run_streamable_http(_create_failing_server, 8184):
+        # Initialize client
+        client = MultiServerMCPClient(
+            {
+                "failing": {
+                    "url": "http://localhost:8184/mcp/",
+                    "transport": "streamable_http",
+                    "timeout": 5,
+                    "sse_read_timeout": 2,
+                }
+            },
+        )
+
+        # Get the failing tool
+        tools = await client.get_tools()
+        assert len(tools) == 1
+        tool = tools[0]
+        assert tool.name == "failing_tool"
+        await tool.ainvoke(
+            {"args": {"message": "test error"}, "id": "1", "type": "tool_call"}
+        )
diff --git a/uv.lock b/uv.lock
index b1f1e0f..c1123fe 100644
--- a/uv.lock
+++ b/uv.lock
@@ -318,7 +318,7 @@ test = [
 [package.metadata]
 requires-dist = [
     { name = "langchain-core", specifier = ">=0.3.36,<0.4" },
-    { name = "mcp", specifier = ">=1.9.2" },
+    { name = "mcp", specifier = "==1.9.2" },
     { name = "typing-extensions", specifier = ">=4.14.0" },
 ]
 
@@ -354,7 +354,7 @@ wheels = [
 
 [[package]]
 name = "mcp"
-version = "1.9.3"
+version = "1.9.2"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -367,9 +367,9 @@ dependencies = [
     { name = "starlette" },
     { name = "uvicorn", marker = "sys_platform != 'emscripten'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/f2/df/8fefc0c6c7a5c66914763e3ff3893f9a03435628f6625d5e3b0dc45d73db/mcp-1.9.3.tar.gz", hash = "sha256:587ba38448e81885e5d1b84055cfcc0ca56d35cd0c58f50941cab01109405388", size = 333045, upload-time = "2025-06-05T15:48:25.681Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/ea/03/77c49cce3ace96e6787af624611b627b2828f0dca0f8df6f330a10eea51e/mcp-1.9.2.tar.gz", hash = "sha256:3c7651c053d635fd235990a12e84509fe32780cd359a5bbef352e20d4d963c05", size = 333066, upload-time = "2025-05-29T14:42:17.76Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/79/45/823ad05504bea55cb0feb7470387f151252127ad5c72f8882e8fe6cf5c0e/mcp-1.9.3-py3-none-any.whl", hash = "sha256:69b0136d1ac9927402ed4cf221d4b8ff875e7132b0b06edd446448766f34f9b9", size = 131063, upload-time = "2025-06-05T15:48:24.171Z" },
+    { url = "https://files.pythonhosted.org/packages/5d/a6/8f5ee9da9f67c0fd8933f63d6105f02eabdac8a8c0926728368ffbb6744d/mcp-1.9.2-py3-none-any.whl", hash = "sha256:bc29f7fd67d157fef378f89a4210384f5fecf1168d0feb12d22929818723f978", size = 131083, upload-time = "2025-05-29T14:42:16.211Z" },
 ]
 
 [[package]]