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 92c3b60b04d..f2ae1bba23a 100644
--- a/gremlin-js/package-lock.json
+++ b/gremlin-js/package-lock.json
@@ -64,7 +64,7 @@
         "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"
@@ -13524,9 +13524,9 @@
       "license": "MIT"
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "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"