diff --git a/backend/package-lock.json b/backend/package-lock.json
index 6324386..5c8e584 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -7,7 +7,7 @@
     "": {
       "name": "backend",
       "version": "0.0.1",
-      "license": "UNLICENSED",
+      "license": "MIT",
       "dependencies": {
         "@nestjs-modules/ioredis": "^2.0.2",
         "@nestjs/common": "^11.1.3",
@@ -47,14 +47,15 @@
         "stripe": "^8.0.0",
         "swagger-ui-express": "^5.0.1",
         "typeorm": "^0.3.25",
-        "uuid": "^11.1.0"
+        "uuid": "^11.1.0",
+        "zod": "^4.4.3"
       },
       "devDependencies": {
         "@nestjs/cli": "^10.0.0",
         "@nestjs/schematics": "^10.0.0",
         "@nestjs/testing": "^11.0.6",
         "@types/bcrypt": "^5.0.2",
-        "@types/cors": "^2.8.18",
+        "@types/cors": "^2.8.19",
         "@types/express": "^5.0.2",
         "@types/ioredis": "^4.28.10",
         "@types/jest": "^29.5.14",
@@ -2697,9 +2698,9 @@
       "license": "MIT"
     },
     "node_modules/@types/cors": {
-      "version": "2.8.18",
-      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.18.tgz",
-      "integrity": "sha512-nX3d0sxJW41CqQvfOzVG1NCTXfFDrDWIghCZncpHeWlVFd81zxB/DLhg7avFg6eHLCRX7ckBmoIIcqa++upvJA==",
+      "version": "2.8.19",
+      "resolved": "https://registry.npmjs.org/@types/cors/-/cors-2.8.19.tgz",
+      "integrity": "sha512-mFNylyeyqN93lfe/9CSxOGREz8cpzAhH+E93xJ4xWQf62V8sQ/24reV2nyzUWM6H6Xji+GGHpkbLe7pVoUEskg==",
       "license": "MIT",
       "dependencies": {
         "@types/node": "*"
@@ -12892,6 +12893,15 @@
       "funding": {
         "url": "https://github.com/sponsors/sindresorhus"
       }
+    },
+    "node_modules/zod": {
+      "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 870a235..04d559c 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -69,7 +69,7 @@
     "@nestjs/schematics": "^10.0.0",
     "@nestjs/testing": "^11.0.6",
     "@types/bcrypt": "^5.0.2",
-    "@types/cors": "^2.8.18",
+    "@types/cors": "^2.8.19",
     "@types/express": "^5.0.2",
     "@types/ioredis": "^4.28.10",
     "@types/jest": "^29.5.14",