diff --git a/packages/cloudflare-worker/package.json b/packages/cloudflare-worker/package.json
index 07f1aebc..95c0bfde 100644
--- a/packages/cloudflare-worker/package.json
+++ b/packages/cloudflare-worker/package.json
@@ -24,7 +24,7 @@
   },
   "devDependencies": {
     "@anthropic-ai/sdk": "^0.55.0",
-    "@cloudflare/workers-types": "^4.20241224.0",
+    "@cloudflare/workers-types": "^5.20260728.1",
     "@size-limit/preset-big-lib": "^12.1.0",
     "size-limit": "^12.1.0",
     "typescript": "^5.7.0",