diff --git a/package-lock.json b/package-lock.json
index 14012ae..407d12e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.29.0",
         "@stdiobus/node": "^2.0.0",
-        "zod": "^3.25.0",
+        "zod": "^4.4.3",
         "zod-to-json-schema": "^3.25.0"
       },
       "bin": {
@@ -6386,9 +6386,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
+      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/package.json b/package.json
index 19e7b44..16d2994 100644
--- a/package.json
+++ b/package.json
@@ -89,7 +89,7 @@
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.29.0",
     "@stdiobus/node": "^2.0.0",
-    "zod": "^3.25.0",
+    "zod": "^4.4.3",
     "zod-to-json-schema": "^3.25.0"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index 9c1f5db..a0461a6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3188,7 +3188,7 @@ zod-to-json-schema@^3.25.0, zod-to-json-schema@^3.25.1:
   resolved "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.25.2.tgz"
   integrity sha512-O/PgfnpT1xKSDeQYSCfRI5Gy3hPf91mKVDuYLUHZJMiDFptvP41MSnWofm8dnCm0256ZNfZIM7DSzuSMAFnjHA==
 
-"zod@^3.25 || ^4.0", zod@^3.25.0:
-  version "3.25.76"
-  resolved "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz"
-  integrity sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==
+"zod@^3.25 || ^4.0", zod@^4.4.3:
+  version "4.4.3"
+  resolved "https://registry.yarnpkg.com/zod/-/zod-4.4.3.tgz#b680f172885d18bbebf21a834ea25e55a1bbf356"
+  integrity sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==