diff --git a/backend/package-lock.json b/backend/package-lock.json
index de087d29..e6a0c6eb 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -43,7 +43,7 @@
         "swagger-jsdoc": "^6.3.0",
         "swagger-ui-express": "^5.0.1",
         "web-push": "^3.6.7",
-        "zod": "^3.23.8"
+        "zod": "^4.6.2"
       },
       "devDependencies": {
         "eslint": "^8.57.0",
@@ -12333,9 +12333,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.6.2",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.6.2.tgz",
+      "integrity": "sha512-lh5RCAGFa1Cm2hjtNwLQhSs/AsqdWnTQaBER9fEwN/88pSh7KOtJavtBx/0VlkN/uFd61SwYmljLMDAsHlvzBQ==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/backend/package.json b/backend/package.json
index 20dee27c..6c0e7c23 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -54,7 +54,7 @@
     "swagger-jsdoc": "^6.3.0",
     "swagger-ui-express": "^5.0.1",
     "web-push": "^3.6.7",
-    "zod": "^3.23.8"
+    "zod": "^4.6.2"
   },
   "devDependencies": {
     "eslint": "^8.57.0",