diff --git a/package-lock.json b/package-lock.json
index fb8082c..253f042 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
         "@types/node": "^24.10.1",
         "cacache": "^20.0.3",
         "lunr": "^2.3.9",
-        "zod": "^3.25.76"
+        "zod": "^4.1.13"
       },
       "bin": {
         "powertools-mcp": "dist/index.js"
@@ -1115,6 +1115,16 @@
         "mcp-inspector-client": "bin/start.js"
       }
     },
+    "node_modules/@modelcontextprotocol/inspector-client/node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
     "node_modules/@modelcontextprotocol/inspector-server": {
       "version": "0.17.2",
       "resolved": "https://registry.npmjs.org/@modelcontextprotocol/inspector-server/-/inspector-server-0.17.2.tgz",
@@ -1134,6 +1144,26 @@
         "mcp-inspector-server": "build/index.js"
       }
     },
+    "node_modules/@modelcontextprotocol/inspector-server/node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
+    "node_modules/@modelcontextprotocol/inspector/node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "dev": true,
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
     "node_modules/@modelcontextprotocol/sdk": {
       "version": "1.23.0",
       "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.23.0.tgz",
@@ -1201,6 +1231,15 @@
         "node": ">=16.20.0"
       }
     },
+    "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/@mswjs/interceptors": {
       "version": "0.40.0",
       "resolved": "https://registry.npmjs.org/@mswjs/interceptors/-/interceptors-0.40.0.tgz",
@@ -6957,9 +6996,10 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.1.13",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.1.13.tgz",
+      "integrity": "sha512-AvvthqfqrAhNH9dnfmrfKzX5upOdjUVJYFqNSlkmGf64gRaTzlPwz99IHYnVs28qYAybvAlBV+H7pn0saFY4Ig==",
+      "license": "MIT",
       "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/package.json b/package.json
index 2819b14..7c4dd5a 100644
--- a/package.json
+++ b/package.json
@@ -57,7 +57,7 @@
     "@types/node": "^24.10.1",
     "cacache": "^20.0.3",
     "lunr": "^2.3.9",
-    "zod": "^3.25.76"
+    "zod": "^4.1.13"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.3.7",