---
title: >-
  Buy Button JS must be upgraded to the latest version - Shopify developer
  changelog
description: >-
  Shopify’s developer changelog documents all changes to Shopify’s platform.
  Find the latest news and learn about new platform opportunities.
source_url:
  html: >-
    https://shopify.dev/changelog/buy-button-js-must-be-upgraded-to-the-latest-version
  md: >-
    https://shopify.dev/changelog/buy-button-js-must-be-upgraded-to-the-latest-version.md
metadata:
  effectiveApiVersion: null
  affectedApi: []
  primaryTag:
    displayName: API
    handle: api
  secondaryTag:
    displayName: Deprecation Announcement
    handle: deprecation
  indicatesActionRequired: true
  createdAt: '2025-06-16T12:27:29-04:00'
  postedAt: '2025-06-27T13:30:00-04:00'
  updatedAt: '2025-06-27T14:10:06-04:00'
  effectiveAt: '2025-06-17T16:00:00-04:00'
---

June 27, 2025

Tags:

* Action Required
* API

# Buy Button JS must be upgraded to the latest version

Last year, we announced the deprecation of the [Checkout APIs](https://shopify.dev/changelog/deprecation-of-checkout-apis), which Buy Button JS is dependent on. As part of this deprecation, checkout functionality will stop working on older versions of Buy Button JS on August 1, 2025 11:00 AM ET. To maintain functionality for customers to complete purchases, ensure that your app or storefront is on the latest major version of [Buy Button JS (v3.0)](https://shopify.dev/docs/storefronts/headless/additional-sdks/buy-button#using-the-latest-version).

For documentation on how to update your Buy Button JS code, refer to the [developer docs](https://shopify.dev/docs/storefronts/headless/additional-sdks/buy-button#using-the-latest-version).

\*\*Critical Deadline: August 1, 2025 11:00 AM ET. \*\*You must update by this date or customers will not be able to complete purchases.