diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 38369ec..5706077 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -23,7 +23,7 @@
         "react-router-dom": "^7.6.3",
         "tailwind-merge": "^3.3.1",
         "tailwindcss-animate": "^1.0.7",
-        "zod": "^3.25.74"
+        "zod": "^4.0.5"
       },
       "devDependencies": {
         "@eslint/js": "^9.31.0",
@@ -2122,6 +2122,15 @@
         "zod": "^3.24.1"
       }
     },
+    "node_modules/better-auth/node_modules/zod": {
+      "version": "3.25.76",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
+      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    },
     "node_modules/better-call": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/better-call/-/better-call-1.0.9.tgz",
@@ -4476,9 +4485,10 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.74",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.74.tgz",
-      "integrity": "sha512-J8poo92VuhKjNknViHRAIuuN6li/EwFbAC8OedzI8uxpEPGiXHGQu9wemIAioIpqgfB4SySaJhdk0mH5Y4ICBg==",
+      "version": "4.0.5",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.0.5.tgz",
+      "integrity": "sha512-/5UuuRPStvHXu7RS+gmvRf4NXrNxpSllGwDnCBcJZtQsKrviYXm54yDGV2KYNLT5kq0lHGcl7lqWJLgSaG+tgA==",
+      "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }
diff --git a/frontend/package.json b/frontend/package.json
index d5ac8dd..88417f4 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -25,7 +25,7 @@
     "react-router-dom": "^7.6.3",
     "tailwind-merge": "^3.3.1",
     "tailwindcss-animate": "^1.0.7",
-    "zod": "^3.25.74"
+    "zod": "^4.0.5"
   },
   "devDependencies": {
     "@eslint/js": "^9.31.0",