diff --git a/js/package-lock.json b/js/package-lock.json
index 172aa8e..83aa544 100644
--- a/js/package-lock.json
+++ b/js/package-lock.json
@@ -244,6 +244,7 @@
       "version": "2.3.1",
       "resolved": "https://registry.npmjs.org/@modelcontextprotocol/core/-/core-2.3.1.tgz",
       "integrity": "sha512-laVmIhPGpWi7rG9q+0UigblRN0Hws/Yjlb6qLFtVqryXVLkc4h+yN8z731POD2LnAGQlFe7/tXhUm7Bi0YB91g==",
+      "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
         "zod": "^4.2.0"
@@ -253,12 +254,24 @@
       }
     },
     "node_modules/@modelcontextprotocol/server": {
-      "version": "2.3.1",
-      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/server/-/server-2.3.1.tgz",
-      "integrity": "sha512-e59MfWuSssj6DoQ96JCTqdW1AXT5/XtnTl0WWd6MU1Ka434fFUGGosCLJbGNySDhHGvxQWoRWK137FXYFkYNWw==",
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/server/-/server-2.4.0.tgz",
+      "integrity": "sha512-rgR9yxSaAJ+bcsi/XroT/S2AfPiIWloXAnrdfYSCms9ivVju0ishu/wW0J21Ho6+ZOR1r7RyeRbjiRuF87ix5Q==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "@modelcontextprotocol/core": "2.4.0",
+        "zod": "^4.2.0"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/@modelcontextprotocol/server/node_modules/@modelcontextprotocol/core": {
+      "version": "2.4.0",
+      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/core/-/core-2.4.0.tgz",
+      "integrity": "sha512-z8QBKqdfXLPzkLQuG4xp8hrVEMm1PZ1IgxMN2sMbJiFiAKOWXnAzogXn2W4aqIBlP1ea6U5yiqVquvUNM1Cj6Q==",
       "license": "Apache-2.0",
       "dependencies": {
-        "@modelcontextprotocol/core": "2.3.1",
         "zod": "^4.2.0"
       },
       "engines": {
@@ -1906,7 +1919,7 @@
       "version": "0.4.3",
       "license": "MIT",
       "dependencies": {
-        "@modelcontextprotocol/server": "^2.3.1",
+        "@modelcontextprotocol/server": "^2.4.0",
         "ng-postcode-js": "^0.4.3"
       },
       "bin": {
diff --git a/js/packages/ng-postcode-mcp/package.json b/js/packages/ng-postcode-mcp/package.json
index bdb03cc..b96cfd0 100644
--- a/js/packages/ng-postcode-mcp/package.json
+++ b/js/packages/ng-postcode-mcp/package.json
@@ -47,7 +47,7 @@
     "prepack": "npm run build"
   },
   "dependencies": {
-    "@modelcontextprotocol/server": "^2.3.1",
+    "@modelcontextprotocol/server": "^2.4.0",
     "ng-postcode-js": "^0.4.3"
   },
   "engines": {