diff --git a/worker/package-lock.json b/worker/package-lock.json
index 1f2ac3e..8ebe6e1 100644
--- a/worker/package-lock.json
+++ b/worker/package-lock.json
@@ -14,7 +14,7 @@
         "marked": "^14.1.4",
         "nanoid": "^5.0.7",
         "pdf-lib": "^1.17.1",
-        "zod": "^3.23.8"
+        "zod": "^4.3.6"
       },
       "devDependencies": {
         "@cloudflare/workers-types": "^4.20240725.0",
@@ -1633,9 +1633,9 @@
       }
     },
     "node_modules/zod": {
-      "version": "3.25.76",
-      "resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
-      "integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
+      "version": "4.3.6",
+      "resolved": "https://registry.npmjs.org/zod/-/zod-4.3.6.tgz",
+      "integrity": "sha512-rftlrkhHZOcjDwkGlnUtZZkvaPHCsDATp4pGpuOOMDaTdDDXF91wuVDJoWoPsKX/3YPQ5fHuF3STjcYyKr+Qhg==",
       "license": "MIT",
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
diff --git a/worker/package.json b/worker/package.json
index 43d3300..5c5c731 100644
--- a/worker/package.json
+++ b/worker/package.json
@@ -14,7 +14,7 @@
     "marked": "^14.1.4",
     "nanoid": "^5.0.7",
     "pdf-lib": "^1.17.1",
-    "zod": "^3.23.8"
+    "zod": "^4.3.6"
   },
   "devDependencies": {
     "@cloudflare/workers-types": "^4.20240725.0",