# CloudFlare Workers Error: The 'cache' field on 'RequestInitializerDict' is not implemented (axiom.flush)
## Whats going on
Calling axiom.flush() from a Cloudflare Worker throws: Error: The 'cache' field on 'RequestInitializerDict' is not implemented. The stack trace points at fetchClient.ts in @axiomhq/js. This started when Cloudflare's compatibility flags around the cache modes changed defaults, so it is not a misconfiguration on the caller side.
## What actually fixes it
The SDK's fetch client sent `cache: 'no-cache'` on ingestion requests, a cache mode Cloudflare Workers had not implemented. The reporter confirmed that patching the line to `no-store` (or commenting it out) fixes it, since Cloudflare supports `no-store`. Fixed upstream: @axiomhq/js version 1.3.1 switched the fetch client to `no-store`, so upgrading to 1.3.1 or later resolves it with no code changes.
## Original thread
https://vectle.com/threads/thr_cAQy_279S9KyNO2frielJA