diff --git a/package-lock.json b/package-lock.json
index 030563a..fa5ff6c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
 				"@cloudflare/agents": "^0.0.16",
 				"@modelcontextprotocol/sdk": "^1.22.0",
 				"agents": "^0.2.23",
-				"zod": "^3.25.76"
+				"zod": "^4.1.13"
 			},
 			"devDependencies": {
 				"@biomejs/biome": "^2.3.7",
@@ -377,7 +377,8 @@
 			"version": "4.1.1",
 			"resolved": "https://registry.npmjs.org/@cfworker/json-schema/-/json-schema-4.1.1.tgz",
 			"integrity": "sha512-gAmrUZSGtKc3AiBL71iNWxDsyUC5uMaKKGdvzYsBoTW/xi42JQHl7eKV2OYzCUqvc+D2RCcf7EXY2iCyFIk6og==",
-			"license": "MIT"
+			"license": "MIT",
+			"peer": true
 		},
 		"node_modules/@cloudflare/agents": {
 			"version": "0.0.16",
@@ -463,6 +464,16 @@
 				"vitest": "2.0.x - 3.2.x"
 			}
 		},
+		"node_modules/@cloudflare/vitest-pool-workers/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/@cloudflare/workerd-darwin-64": {
 			"version": "1.20251118.0",
 			"resolved": "https://registry.npmjs.org/@cloudflare/workerd-darwin-64/-/workerd-darwin-64-1.20251118.0.tgz",
@@ -1500,6 +1511,15 @@
 				}
 			}
 		},
+		"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/@opentelemetry/api": {
 			"version": "1.9.0",
 			"resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.9.0.tgz",
@@ -1932,6 +1952,7 @@
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 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"undici-types": "~7.16.0"
 			}
@@ -2042,6 +2063,7 @@
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 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"@vitest/utils": "3.2.4",
 				"pathe": "^2.0.3",
@@ -2057,6 +2079,7 @@
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 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"@vitest/pretty-format": "3.2.4",
 				"magic-string": "^0.30.17",
@@ -2085,6 +2108,7 @@
 			"integrity": "sha512-hGISOaP18plkzbWEcP/QvtRW1xDXF2+96HbEX6byqQhAUbiS5oH6/9JwW+QsQCIYON2bI6QZBF+2PvOmrRZ9wA==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"@vitest/utils": "3.2.4",
 				"fflate": "^0.8.2",
@@ -2190,6 +2214,15 @@
 				}
 			}
 		},
+		"node_modules/agents/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/ai": {
 			"version": "5.0.89",
 			"resolved": "https://registry.npmjs.org/ai/-/ai-5.0.89.tgz",
@@ -2910,6 +2943,7 @@
 			"resolved": "https://registry.npmjs.org/express/-/express-5.1.0.tgz",
 			"integrity": "sha512-DT9ck5YIRU+8GYzzU5kT3eHGA5iL+1Zd0EutOmTE9Dtk+Tvuzd23VBU+ec7HPNSTxXYO55gPV/hq4pSBJDjFpA==",
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"accepts": "^2.0.0",
 				"body-parser": "^2.2.0",
@@ -3913,6 +3947,7 @@
 			"resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
 			"integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
 			"license": "MIT",
+			"peer": true,
 			"engines": {
 				"node": ">=12"
 			},
@@ -4675,6 +4710,7 @@
 			"resolved": "https://registry.npmjs.org/typescript/-/typescript-5.8.3.tgz",
 			"integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
 			"license": "Apache-2.0",
+			"peer": true,
 			"bin": {
 				"tsc": "bin/tsc",
 				"tsserver": "bin/tsserver"
@@ -4706,6 +4742,7 @@
 			"integrity": "sha512-i7qRCmY42zmCwnYlh9H2SvLEypEFGye5iRmEMKjcGi7zk9UquigRjFtTLz0TYqr0ZGLZhaMHl/foy1bZR+Cwlw==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"pathe": "^2.0.3"
 			}
@@ -4734,6 +4771,7 @@
 			"integrity": "sha512-4nVGliEpxmhCL8DslSAUdxlB6+SMrhB0a1v5ijlh1xB1nEPuy1mxaHxysVucLHuWryAxLWg6a5ei+U4TLn/rFg==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"esbuild": "^0.25.0",
 				"fdir": "^6.5.0",
@@ -4832,6 +4870,7 @@
 			"integrity": "sha512-LUCP5ev3GURDysTWiP47wRRUpLKMOfPh+yKTx3kVIEiu5KOMeqzpnYNsKyOoVrULivR8tLcks4+lga33Whn90A==",
 			"dev": true,
 			"license": "MIT",
+			"peer": true,
 			"dependencies": {
 				"@types/chai": "^5.2.2",
 				"@vitest/expect": "3.2.4",
@@ -4938,6 +4977,7 @@
 			"dev": true,
 			"hasInstallScript": true,
 			"license": "Apache-2.0",
+			"peer": true,
 			"bin": {
 				"workerd": "bin/workerd"
 			},
@@ -5214,21 +5254,22 @@
 			}
 		},
 		"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"
 			}
 		},
 		"node_modules/zod-to-json-schema": {
-			"version": "3.24.6",
-			"resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.24.6.tgz",
-			"integrity": "sha512-h/z3PKvcTcTetyjl1fkj79MHNEjm+HpD6NXheWjzOekY7kV+lwDYnHw+ivHkijnCSMz1yJaWBD9vu/Fcmk+vEg==",
+			"version": "3.25.0",
+			"resolved": "https://registry.npmjs.org/zod-to-json-schema/-/zod-to-json-schema-3.25.0.tgz",
+			"integrity": "sha512-HvWtU2UG41LALjajJrML6uQejQhNJx+JBO9IflpSja4R03iNWfKXrj6W2h7ljuLyc1nKS+9yDyL/9tD1U/yBnQ==",
 			"license": "ISC",
 			"peerDependencies": {
-				"zod": "^3.24.1"
+				"zod": "^3.25 || ^4"
 			}
 		},
 		"node_modules/zod-to-ts": {
diff --git a/package.json b/package.json
index 2431e36..8ae3f60 100644
--- a/package.json
+++ b/package.json
@@ -47,7 +47,7 @@
 		"@cloudflare/agents": "^0.0.16",
 		"@modelcontextprotocol/sdk": "^1.22.0",
 		"agents": "^0.2.23",
-		"zod": "^3.25.76"
+		"zod": "^4.1.13"
 	},
 	"devDependencies": {
 		"@biomejs/biome": "^2.3.7",