diff --git a/gremlin-js/gremlin-mcp/package.json b/gremlin-js/gremlin-mcp/package.json
index 65892bce6fb..0bcbea498c4 100644
--- a/gremlin-js/gremlin-mcp/package.json
+++ b/gremlin-js/gremlin-mcp/package.json
@@ -50,7 +50,7 @@
     "effect": "^3.17.9",
     "gremlin": "4.0.0-alpha1",
     "winston": "^3.17.0",
-    "zod": "^3.25.76"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@eslint/js": "^10.0.0",
diff --git a/gremlin-js/package-lock.json b/gremlin-js/package-lock.json
index e9d8b553943..efe1636f069 100644
--- a/gremlin-js/package-lock.json
+++ b/gremlin-js/package-lock.json
@@ -79,7 +79,7 @@
         "gremlin": "4.0.0-alpha1",
         "gremlint": "4.0.0-alpha1",
         "winston": "^3.17.0",
-        "zod": "^3.25.76"
+        "zod": "^4.3.6"
       },
       "bin": {
         "gremlin-mcp": "dist/server.js"
@@ -213,6 +213,15 @@
         "node": ">=18"
       }
     },
+    "gremlin-mcp/node_modules/@modelcontextprotocol/sdk/node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
     "gremlin-mcp/node_modules/balanced-match": {
       "version": "4.0.4",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-4.0.4.tgz",
@@ -422,6 +431,15 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "gremlin-mcp/node_modules/zod": {
+      "version": "4.3.6",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.6.tgz",
+      "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
     "gremlint": {
       "version": "4.0.0-alpha1",
       "license": "Apache-2.0",
@@ -13740,6 +13758,7 @@
       "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
       "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
       "license": "MIT",
+      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }