diff --git a/package-lock.json b/package-lock.json
index 1d1f09a..ccec506 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -16,7 +16,7 @@
         "@stoplight/spectral-parsers": "^1.0.4",
         "@stoplight/spectral-rulesets": "^1.21.0",
         "yaml": "^2.6.1",
-        "zod": "^3.23.8"
+        "zod": "^4.6.5"
       },
       "bin": {
         "api-governance-mcp": "src/server.mjs"
@@ -523,7 +523,6 @@
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.20.0.tgz",
       "integrity": "sha512-Thbli+OlOj+iMPYFBVBfJ3OmCAnaSyNn4M1vz9T6Gka5Jt9ba/HIR56joy65tY6kx/FCF5VXNB819Y7/GUrBGA==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "fast-deep-equal": "^3.1.3",
         "fast-uri": "^3.0.1",
@@ -1203,7 +1202,6 @@
       "resolved": "https://registry.npmjs.org/express/-/express-5.2.1.tgz",
       "integrity": "sha512-hIS4idWWai69NezIdRt2xFVofaF4j+6INOpJlVOLDO8zXGpUVEVzIYk12UUi2JzjEzWL3IOAxcTubgz9Po0yXw==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "accepts": "^2.0.0",
         "body-parser": "^2.2.1",
@@ -1557,7 +1555,6 @@
       "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.27.tgz",
       "integrity": "sha512-1yrb/+w6HWQJrUCLkJ2IF5jNIPvvFkblV5RNOYl6bV+OA6p9GLcMpHFFGTosSvHvcAUibuUukRqhlYI4z32C7Q==",
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=16.9.0"
       }
@@ -2015,7 +2012,6 @@
       "resolved": "https://registry.npmjs.org/jsep/-/jsep-1.4.0.tgz",
       "integrity": "sha512-B7qPcEVE3NVkmSJbaYxvv4cHkVW7DQsZz13pUMrfS8z8Q/BuShN+gcTXrUlPiGqM2/t/EEaI030bpxMqY8gMlw==",
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">= 10.16.0"
       }
@@ -3128,11 +3124,10 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.6.5",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.6.5.tgz",
+      "integrity": "sha512-v5l/aFXZQeai4awLbOpSoHecE9UiMrnfx75tEXLjNonXVARxQ5mOeipTjROUchszUNCqnE+hqAMujRsRHsut2Q==",
       "license": "MIT",
-      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
diff --git a/package.json b/package.json
index e77cba7..a6e8960 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,6 @@
     "@stoplight/spectral-parsers": "^1.0.4",
     "@stoplight/spectral-rulesets": "^1.21.0",
     "yaml": "^2.6.1",
-    "zod": "^3.23.8"
+    "zod": "^4.6.5"
   }
 }