diff --git a/src/js-host-api/examples/mcp-server/package-lock.json b/src/js-host-api/examples/mcp-server/package-lock.json
index 933b8e6f..adf493b6 100644
--- a/src/js-host-api/examples/mcp-server/package-lock.json
+++ b/src/js-host-api/examples/mcp-server/package-lock.json
@@ -9,7 +9,7 @@
             "version": "0.1.0",
             "dependencies": {
                 "@modelcontextprotocol/sdk": "^1.26.0",
-                "zod": "^3.25.0"
+                "zod": "^4.4.3"
             },
             "devDependencies": {
                 "vitest": "^4.1.0"
@@ -2393,9 +2393,9 @@
             "license": "ISC"
         },
         "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/src/js-host-api/examples/mcp-server/package.json b/src/js-host-api/examples/mcp-server/package.json
index 288a0b02..e7e0510f 100644
--- a/src/js-host-api/examples/mcp-server/package.json
+++ b/src/js-host-api/examples/mcp-server/package.json
@@ -11,7 +11,7 @@
     },
     "dependencies": {
         "@modelcontextprotocol/sdk": "^1.26.0",
-        "zod": "^3.25.0"
+        "zod": "^4.4.3"
     },
     "devDependencies": {
         "vitest": "^4.1.0"