---
title: AssemblyScript SDK 0.4.0
summary: null
url: >-
  https://www.fastly.com/documentation/reference/changes/2021/06/assemblyscript-sdk-0.4.0
---

## Fixed

- MultiValueHostcalls no longer error on values larger than 4096 bytes. This fixes applications that handle large headers.
- Fixed the AssemblyScript dictionary not being able to get a dictionary value of the maximum size (8000 characters).

## Changed

- Exposed `FastlyUpstreamResponse` on the `Fastly` Namespace

## Added

- Updated the package to use AssemblyScript 0.19.x .