diff --git a/package.json b/package.json
index 9cd3501..14ffe8d 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "@tailwindcss/oxide-linux-x64-gnu": "^4.3.0"
   },
   "devDependencies": {
-    "@cloudflare/workers-types": "^4.20260605.1",
+    "@cloudflare/workers-types": "^5.20260727.1",
     "@hono/vite-build": "^1.11.1",
     "@hono/vite-cloudflare-pages": "^0.4.3",
     "@hono/vite-dev-server": "^0.25.3",