diff --git a/backend/package-lock.json b/backend/package-lock.json
index 0834cbe..029397b 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -20,7 +20,7 @@
         "multer": "^2.0.2",
         "pg": "^8.13.1",
         "uuid": "^13.0.0",
-        "zod": "^3.24.1"
+        "zod": "^4.1.12"
       },
       "devDependencies": {
         "@types/cors": "^2.8.17",
@@ -2421,9 +2421,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.1.12",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.1.12.tgz",
+      "integrity": "sha512-JInaHOamG8pt5+Ey8kGmdcAcg3OL9reK8ltczgHTAwNhMys/6ThXHityHxVV2p3fkw/c+MAvBHFVYHFZDmjMCQ==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/backend/package.json b/backend/package.json
index 6a5c6e7..dde073c 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -22,7 +22,7 @@
     "multer": "^2.0.2",
     "pg": "^8.13.1",
     "uuid": "^13.0.0",
-    "zod": "^3.24.1"
+    "zod": "^4.1.12"
   },
   "devDependencies": {
     "@types/cors": "^2.8.17",