diff --git a/package.json b/package.json
index 3053685..a299495 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
   "module": "dist/FastMCP.js",
   "types": "dist/FastMCP.d.ts",
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.1.0",
+    "@modelcontextprotocol/sdk": "^1.4.1",
     "execa": "^9.5.2",
     "file-type": "^19.6.0",
     "fuse.js": "^7.0.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 7bc736a..f5f3ef4 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -9,8 +9,8 @@ importers:
   .:
     dependencies:
       '@modelcontextprotocol/sdk':
-        specifier: ^1.1.0
-        version: 1.1.0
+        specifier: ^1.4.1
+        version: 1.4.1
       execa:
         specifier: ^9.5.2
         version: 9.5.2
@@ -460,8 +460,8 @@ packages:
   '@jridgewell/trace-mapping@0.3.25':
     resolution: {integrity: sha512-vNk6aEwybGtawWmy/PzwnGDOjCkLWSD2wqvjGGAgOAwCGWySYXfYoxt00IJkTF+8Lb57DwOb3Aa0o9CApepiYQ==}
 
-  '@modelcontextprotocol/sdk@1.1.0':
-    resolution: {integrity: sha512-o5PIPz0vc1bJYXS0oLvRr8yUOzYtxEFL1rWP4aiO8qLslCksmbKhONy6CTpq0WPuIXUt2YuXoRtVA2EcLix3fw==}
+  '@modelcontextprotocol/sdk@1.4.1':
+    resolution: {integrity: sha512-wS6YC4lkUZ9QpP+/7NBTlVNiEvsnyl0xF7rRusLF+RsG0xDPc/zWR7fEEyhKnnNutGsDAZh59l/AeoWGwIb1+g==}
     engines: {node: '>=18'}
 
   '@nodelib/fs.scandir@2.1.5':
@@ -2679,11 +2679,13 @@ snapshots:
       '@jridgewell/resolve-uri': 3.1.2
       '@jridgewell/sourcemap-codec': 1.5.0
 
-  '@modelcontextprotocol/sdk@1.1.0':
+  '@modelcontextprotocol/sdk@1.4.1':
     dependencies:
       content-type: 1.0.5
+      eventsource: 3.0.2
       raw-body: 3.0.0
       zod: 3.24.1
+      zod-to-json-schema: 3.24.1(zod@3.24.1)
 
   '@nodelib/fs.scandir@2.1.5':
     dependencies:
@@ -3471,7 +3473,7 @@ snapshots:
 
   fastmcp@1.9.0:
     dependencies:
-      '@modelcontextprotocol/sdk': 1.1.0
+      '@modelcontextprotocol/sdk': 1.4.1
       execa: 9.5.2
       file-type: 19.6.0
       mcp-proxy: 2.4.0
@@ -3845,7 +3847,7 @@ snapshots:
 
   mcp-proxy@2.4.0:
     dependencies:
-      '@modelcontextprotocol/sdk': 1.1.0
+      '@modelcontextprotocol/sdk': 1.4.1
       eventsource: 3.0.2
       fastmcp: 1.9.0
       yargs: 17.7.2