diff --git a/package-lock.json b/package-lock.json
index f7f403b..b6c85a8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
         "@descope/node-sdk": "^1.7.11",
         "@modelcontextprotocol/sdk": "^1.15.1",
         "express": "4.21.2",
-        "zod": "3.25.76"
+        "zod": "4.1.5"
       },
       "devDependencies": {
         "@eslint/js": "^9.24.0",
@@ -2119,6 +2119,15 @@
         "node": ">= 0.6"
       }
     },
+    "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"
+      }
+    },
     "node_modules/@napi-rs/wasm-runtime": {
       "version": "0.2.12",
       "resolved": "https://registry.npmjs.org/@napi-rs/wasm-runtime/-/wasm-runtime-0.2.12.tgz",
@@ -14515,9 +14524,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.1.5",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.1.5.tgz",
+      "integrity": "sha512-rcUUZqlLJgBC33IT3PNMgsCq6TzLQEG/Ei/KTCU0PedSWRMAXoOUN+4t/0H+Q8bdnLPdqUYnvboJT0bn/229qg==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/package.json b/package.json
index 5f9a686..4d53078 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "@descope/node-sdk": "^1.7.11",
     "@modelcontextprotocol/sdk": "^1.15.1",
     "express": "4.21.2",
-    "zod": "3.25.76"
+    "zod": "4.1.5"
   },
   "devDependencies": {
     "@eslint/js": "^9.24.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 524830b..5e83fb2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -21,8 +21,8 @@ importers:
         specifier: 4.21.2
         version: 4.21.2
       zod:
-        specifier: 3.25.76
-        version: 3.25.76
+        specifier: 4.1.5
+        version: 4.1.5
     devDependencies:
       '@eslint/js':
         specifier: ^9.24.0
@@ -3567,6 +3567,9 @@ packages:
   zod@3.25.76:
     resolution: {integrity: sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==}
 
+  zod@4.1.5:
+    resolution: {integrity: sha512-rcUUZqlLJgBC33IT3PNMgsCq6TzLQEG/Ei/KTCU0PedSWRMAXoOUN+4t/0H+Q8bdnLPdqUYnvboJT0bn/229qg==}
+
 snapshots:
 
   '@ampproject/remapping@2.3.0':
@@ -7386,3 +7389,5 @@ snapshots:
       zod: 3.25.76
 
   zod@3.25.76: {}
+
+  zod@4.1.5: {}