---
title: "Heroku Python buildpacks updated to Pipenv 2026.9.1 and uv 0.13.1: 2026-10-14 | Harbyn"
description: "Heroku Python buildpacks updated to Pipenv 2026.9.1 and uv 0.13.1, announced Oct 14, 2026."
canonical: "https://harbyn.com/changes/heroku/2026-10-14-python-buildpacks-updated-to-pipenv-2026-9-1-and-uv-0-13-1"
last-updated: 2026-10-14
---

# Heroku Python buildpacks updated to Pipenv 2026.9.1 and uv 0.13.1

Markdown version of <https://harbyn.com/changes/heroku/2026-10-14-python-buildpacks-updated-to-pipenv-2026-9-1-and-uv-0-13-1>.

Behavior change - Heroku. low severity. In effect.

The Python buildpacks now build apps with uv 0.13.1 (from 0.12.21) and, for Cedar-generation apps only, Pipenv 2026.9.1 (from 2026.8.0).

## Facts

| Fact | Value |
| --- | --- |
| Vendor | [Heroku](https://harbyn.com/vendors/heroku.md) |
| Kind | Behavior change |
| Severity | low |
| Status | In effect |
| Announced | Oct 14, 2026 |
| Added to Harbyn | Oct 14, 2026 |
| Lead time | No dated deadline |
| Review | Reviewed by a person, extracted by a model |

## Find it in your code

```sh
npx harbyn scan
```

This change names no identifier the scanner can match line by line, so the scan tells you whether your repository uses Heroku, from its packages and API hosts. Nothing leaves your machine.

## Sources

Where this event comes from: the page we read, when we read it, and the hash of that snapshot.

- <https://devcenter.heroku.com/changelog> (changelog, fetched 2026-10-14 17:17 UTC, sha256 `e32b198dbc67ec654f583dc4815c6850919789ec15a5165b31601fc081420553`)

## Related changes

### More from Heroku

- [Heroku-22 stack is deprecated, supported through April 2027](https://harbyn.com/changes/heroku/2026-10-08-heroku-22-is-deprecated.md) (Deprecation, effective Apr 2027)
- [Python build tools updated](https://harbyn.com/changes/heroku/2026-10-21-python-build-tools-updated.md) (Behavior change, announced Oct 21, 2026)

### Changes at other vendors

- [Amazon Selling Partner API: ORDER\_CHANGE notifications add PreFulfillmentStatusChange for Amazon Autos](https://harbyn.com/changes/amazon-sp-api/2026-10-14-sp-api-updates-new-listings-items-api-ivp-values-in-eu5-jp-and-ca-stores-oct-3.md) (effective Oct 28, 2026)
- [BigCommerce: 301 redirects will apply only to storefront channels](https://harbyn.com/changes/bigcommerce/2026-10-07-301-redirects-now-apply-to-storefront-channels-only.md) (effective Nov 10, 2026)
- [GitHub: Secret scanning audit log business field changes to enterprise slug](https://harbyn.com/changes/github/2026-10-20-updates-to-github-secret-scanning-7.md) (effective Nov 12, 2026)
- [Jira / Atlassian Cloud: New IP address ranges in use from January 1, 2027](https://harbyn.com/changes/atlassian-jira/2026-10-16-atlassian-cloud-adds-new-ip-address-ranges.md) (effective Jan 1, 2027)

[All upcoming deadlines](https://harbyn.com/deadlines.md)