diff --git a/typescript/package-lock.json b/typescript/package-lock.json
index 5fd2b21..ade87dd 100644
--- a/typescript/package-lock.json
+++ b/typescript/package-lock.json
@@ -14,7 +14,7 @@
         "@openai/agents": "^0.3.3",
         "@sumup/sdk": "^0.0.11",
         "ai": "^5.0.103",
-        "zod": "^3.25.76"
+        "zod": "^4.1.13"
       },
       "devDependencies": {
         "@biomejs/biome": "^2.3.7",
@@ -2946,9 +2946,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.1.13",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.1.13.tgz",
+      "integrity": "sha512-AvvthqfqrAhNH9dnfmrfKzX5upOdjUVJYFqNSlkmGf64gRaTzlPwz99IHYnVs28qYAybvAlBV+H7pn0saFY4Ig==",
       "license": "MIT",
       "peer": true,
       "funding": {
diff --git a/typescript/package.json b/typescript/package.json
index f93e34b..bc8199e 100644
--- a/typescript/package.json
+++ b/typescript/package.json
@@ -53,7 +53,7 @@
     "@openai/agents": "^0.3.3",
     "@sumup/sdk": "^0.0.11",
     "ai": "^5.0.103",
-    "zod": "^3.25.76"
+    "zod": "^4.1.13"
   },
   "devDependencies": {
     "@biomejs/biome": "^2.3.7",