diff --git a/backend/app/api/mcp_server.py b/backend/app/api/mcp_server.py
index a0dbe5c..2ab8f65 100644
--- a/backend/app/api/mcp_server.py
+++ b/backend/app/api/mcp_server.py
@@ -4,7 +4,6 @@ from datetime import datetime, timedelta, timezone, date as date_type
 from decimal import Decimal
 
 from mcp.server.fastmcp import FastMCP
-from mcp.server.transport_security import TransportSecuritySettings
 from sqlalchemy import select, and_, text, or_
 from sqlalchemy.orm import selectinload
 
@@ -16,12 +15,7 @@ from app.models.shopping import ShoppingList, ListItem, Product
 _VALID_STATUSES = {"pending", "done", "cancelled"}
 _VALID_PRIORITIES = {"low", "medium", "high"}
 
-mcp = FastMCP(
-    "HomeHub",
-    stateless_http=True,
-    streamable_http_path="/",
-    transport_security=TransportSecuritySettings(enable_dns_rebinding_protection=False),
-)
+mcp = FastMCP("HomeHub", stateless_http=True, streamable_http_path="/")
 
 
 def _serialize(obj):
diff --git a/frontend/nginx.conf b/frontend/nginx.conf
index 2e99e20..c95d5e9 100644
--- a/frontend/nginx.conf
+++ b/frontend/nginx.conf
@@ -27,7 +27,7 @@ server {
 
     location /mcp {
         proxy_pass http://backend:8000/mcp;
-        proxy_set_header Host $host;
+        proxy_set_header Host localhost;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_http_version 1.1;
         proxy_set_header Connection "";