diff --git a/package.json b/package.json
index c9c20e6..32f20f9 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "packageManager": "pnpm@10.8.1",
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.24.3",
-    "zod": "^3.25.76",
+    "zod": "^4.1.13",
     "zod-to-json-schema": "^3.25.0"
   },
   "devDependencies": {
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 9148823..c02ccdf 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -14,13 +14,13 @@ importers:
     dependencies:
       '@modelcontextprotocol/sdk':
         specifier: ^1.24.3
-        version: 1.24.3(zod@3.25.76)
+        version: 1.24.3(zod@4.1.13)
       zod:
-        specifier: ^3.25.76
-        version: 3.25.76
+        specifier: ^4.1.13
+        version: 4.1.13
       zod-to-json-schema:
         specifier: ^3.25.0
-        version: 3.25.0(zod@3.25.76)
+        version: 3.25.0(zod@4.1.13)
     devDependencies:
       '@eslint/js':
         specifier: ^9.39.1
@@ -1543,8 +1543,8 @@ packages:
     peerDependencies:
       zod: ^3.25 || ^4
 
-  zod@3.25.76:
-    resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
+  zod@4.1.13:
+    resolution: {integrity: sha512-AvvthqfqrAhNH9dnfmrfKzX5upOdjUVJYFqNSlkmGf64gRaTzlPwz99IHYnVs28qYAybvAlBV+H7pn0saFY4Ig==}
 
 snapshots:
 
@@ -1785,7 +1785,7 @@ snapshots:
       '@jridgewell/resolve-uri': 3.1.2
       '@jridgewell/sourcemap-codec': 1.5.5
 
-  '@modelcontextprotocol/sdk@1.24.3(zod@3.25.76)':
+  '@modelcontextprotocol/sdk@1.24.3(zod@4.1.13)':
     dependencies:
       ajv: 8.17.1
       ajv-formats: 3.0.1(ajv@8.17.1)
@@ -1799,8 +1799,8 @@ snapshots:
       jose: 6.1.3
       pkce-challenge: 5.0.1
       raw-body: 3.0.2
-      zod: 3.25.76
-      zod-to-json-schema: 3.25.0(zod@3.25.76)
+      zod: 4.1.13
+      zod-to-json-schema: 3.25.0(zod@4.1.13)
     transitivePeerDependencies:
       - supports-color
 
@@ -2922,8 +2922,8 @@ snapshots:
 
   yocto-queue@0.1.0: {}
 
-  zod-to-json-schema@3.25.0(zod@3.25.76):
+  zod-to-json-schema@3.25.0(zod@4.1.13):
     dependencies:
-      zod: 3.25.76
+      zod: 4.1.13
 
-  zod@3.25.76: {}
+  zod@4.1.13: {}