diff --git a/package.json b/package.json
index f39d00b..be7fa8c 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
   "dependencies": {
     "body-parser": "1.20.4",
     "express": "4.22.1",
-    "zod": "3.25.76"
+    "zod": "4.3.5"
   },
   "devDependencies": {
     "@devoxa/eslint-config": "4.0.2",
diff --git a/yarn.lock b/yarn.lock
index aefc580..a38696c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3125,7 +3125,7 @@ yocto-queue@^0.1.0:
   resolved "https://registry.yarnpkg.com/yocto-queue/-/yocto-queue-0.1.0.tgz#0294eb3dee05028d31ee1a5fa2c556a6aaf10a1b"
   integrity sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==
 
-zod@3.25.76:
-  version "3.25.76"
-  resolved "https://registry.yarnpkg.com/zod/-/zod-3.25.76.tgz#26841c3f6fd22a6a2760e7ccb719179768471e34"
-  integrity sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==
+zod@4.3.5:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/zod/-/zod-4.3.5.tgz#aeb269a6f9fc259b1212c348c7c5432aaa474d2a"
+  integrity sha512-k7Nwx6vuWx1IJ9Bjuf4Zt1PEllcwe7cls3VNzm4CQ1/hgtFUK2bRNG3rvnpPUhFjmqJKAKtjV576KnUkHocg/g==