diff --git a/backend/package-lock.json b/backend/package-lock.json
index e60955a..a364187 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -19,7 +19,7 @@
         "pino": "^9.1.0",
         "pino-pretty": "^11.1.0",
         "ws": "^8.17.0",
-        "zod": "^3.25.76"
+        "zod": "^4.4.3"
       },
       "devDependencies": {
         "@types/node": "^20.11.0",
@@ -5965,9 +5965,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.4.3",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.4.3.tgz",
+      "integrity": "sha512-ytENFjIJFl2UwYglde2jchW2Hwm4GJFLDiSXWdTrJQBIN9Fcyp7n4DhxJEiWNAJMV1/BqWfW/kkg71UDcHJyTQ==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/backend/package.json b/backend/package.json
index 3e3d75b..171960b 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -27,7 +27,7 @@
     "pino": "^9.1.0",
     "pino-pretty": "^11.1.0",
     "ws": "^8.17.0",
-    "zod": "^3.25.76"
+    "zod": "^4.4.3"
   },
   "devDependencies": {
     "@types/node": "^20.11.0",