diff --git a/package-lock.json b/package-lock.json
index 0c60044..e5c28a6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.12.0",
-        "zod": "^3.25.0"
+        "zod": "^4.3.6"
       },
       "bin": {
         "mcp-analytics": "src/index.js"
@@ -376,7 +376,6 @@
       "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",
@@ -581,7 +580,6 @@
       "resolved": "https://registry.npmjs.org/hono/-/hono-4.12.9.tgz",
       "integrity": "sha512-wy3T8Zm2bsEvxKZM5w21VdHDDcwVS1yUFFY6i8UobSsKfFceT7TOwhbhfKsDyx7tYQlmRM5FLpIuYvNFyjctiA==",
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=16.9.0"
       }
@@ -1127,11 +1125,10 @@
       "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": "4.3.6",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.6.tgz",
+      "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
       "license": "MIT",
-      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
diff --git a/package.json b/package.json
index 8868ca5..74eff6e 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,6 @@
   },
   "dependencies": {
     "@modelcontextprotocol/sdk": "^1.12.0",
-    "zod": "^3.25.0"
+    "zod": "^4.3.6"
   }
 }