diff --git a/pyproject.toml b/pyproject.toml
index 1c2dfced..8872384c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dependencies = [
   "pyright>=1.1.396,<2",
   "overrides>=7.7.0,<8",
   "python-dotenv>=1.0.0, <2",
-  "mcp==1.12.2",
+  "mcp==1.12.3",
   "flask>=3.0.0",
   "sensai-utils>=1.5.0",
   "pydantic>=2.10.6",
diff --git a/src/serena/mcp.py b/src/serena/mcp.py
index f5f785e0..9926af8e 100644
--- a/src/serena/mcp.py
+++ b/src/serena/mcp.py
@@ -170,10 +170,8 @@ class SerenaMCPFactory:
         # `.env` files (e.g. containing LOG_LEVEL) that are not supposed to override the MCP settings;
         # retain only FASTMCP_ prefix for already set environment variables.
         Settings.model_config = SettingsConfigDict(env_prefix="FASTMCP_")
-
-        mcp_settings: Settings = Settings(lifespan=self.server_lifespan, host=host, port=port)
         instructions = self._get_initial_instructions()
-        mcp = FastMCP(**mcp_settings.model_dump(), instructions=instructions)
+        mcp = FastMCP(lifespan=self.server_lifespan, host=host, port=port, instructions=instructions)
         return mcp
 
     @asynccontextmanager
diff --git a/uv.lock b/uv.lock
index 1f278a04..a1169097 100644
--- a/uv.lock
+++ b/uv.lock
@@ -558,7 +558,7 @@ wheels = [
 
 [[package]]
 name = "mcp"
-version = "1.12.2"
+version = "1.12.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "anyio" },
@@ -573,9 +573,9 @@ dependencies = [
     { name = "starlette" },
     { name = "uvicorn", marker = "sys_platform != 'emscripten'" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/66/85/f36d538b1286b7758f35c1b69d93f2719d2df90c01bd074eadd35f6afc35/mcp-1.12.2.tar.gz", hash = "sha256:a4b7c742c50ce6ed6d6a6c096cca0e3893f5aecc89a59ed06d47c4e6ba41edcc", size = 426202, upload-time = "2025-07-24T18:29:05.175Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/4d/19/9955e2df5384ff5dd25d38f8e88aaf89d2d3d9d39f27e7383eaf0b293836/mcp-1.12.3.tar.gz", hash = "sha256:ab2e05f5e5c13e1dc90a4a9ef23ac500a6121362a564447855ef0ab643a99fed", size = 427203, upload-time = "2025-07-31T18:36:36.795Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/2f/cf/3fd38cfe43962452e4bfadc6966b2ea0afaf8e0286cb3991c247c8c33ebd/mcp-1.12.2-py3-none-any.whl", hash = "sha256:b86d584bb60193a42bd78aef01882c5c42d614e416cbf0480149839377ab5a5f", size = 158473, upload-time = "2025-07-24T18:29:03.419Z" },
+    { url = "https://files.pythonhosted.org/packages/8f/8b/0be74e3308a486f1d127f3f6767de5f9f76454c9b4183210c61cc50999b6/mcp-1.12.3-py3-none-any.whl", hash = "sha256:5483345bf39033b858920a5b6348a303acacf45b23936972160ff152107b850e", size = 158810, upload-time = "2025-07-31T18:36:34.915Z" },
 ]
 
 [[package]]
@@ -1174,7 +1174,7 @@ requires-dist = [
     { name = "jinja2", specifier = ">=3.1.6" },
     { name = "jinja2", marker = "extra == 'dev'" },
     { name = "joblib", specifier = ">=1.5.1" },
-    { name = "mcp", specifier = "==1.12.2" },
+    { name = "mcp", specifier = "==1.12.3" },
     { name = "mypy", marker = "extra == 'dev'", specifier = ">=1.16.1" },
     { name = "overrides", specifier = ">=7.7.0,<8" },
     { name = "pathspec", specifier = ">=0.12.1" },