Heroku Changelog

Additions and changes to the Heroku platform.

October 05, 2025

• Python buildpacks updated to uv 0.8.23

October 01, 2025

• Updates to slug, OCI image, and release artifact retention policies

September 30, 2025

• PHP updates - Late September 2025

September 29, 2025

• Slugs and OCI Image endpoint changes for Heroku Platform API
• Rails apps now have `PUMA_PERSISTENT_TIMEOUT=95` set by default

September 26, 2025

• Node.js 24.9.0 is now available

September 25, 2025

• Heroku Platform API: New optional release ID parameter for pipeline promotions
• Node.js 22.20.0 is now available

September 24, 2025

• Standard and Performance-tier apps now require Router 2.0
• New error code H33: HTTP/2 Stream Broken
• Heroku-22 and Heroku-24 stacks updated

September 23, 2025

• Python buildpacks updated to Poetry 2.2.1 and uv 0.8.20

September 19, 2025

• Python buildpacks updated to Poetry 2.2.0 and uv 0.8.18

September 17, 2025

• .NET buildpacks auto-detection updated
• Heroku CLI now supports REPL and Prompt mode
• Add-on Partners limited to 100 add-ons
• OpenJDK 25 is now the default OpenJDK version for Java, Scala and Clojure apps
• OpenJDK 25 is now available for Java, Scala and Clojure apps

September 16, 2025

• Ruby version 3.4.6 is now available

September 15, 2025

• Heroku AI Studio is now available

September 12, 2025

• Node.js 24.8.0 is now available

September 11, 2025

• Pydantic AI integration now available

September 09, 2025

• .NET SDK 8.0.120, 8.0.317, 8.0.414, 9.0.110, 9.0.305 and 10.0.100-rc.1.25451.107 are now available
• Rack apps now have `PUMA_PERSISTENT_TIMEOUT=95` set by default
• Python buildpacks updated to uv 0.8.15

September 08, 2025

• heroku run is now available for Fir-generation apps
• Go 1.24.7 and 1.25.1 now available
• Heroku-22 and Heroku-24 stacks updated

September 05, 2025

• Upcoming migration from Heroku Status to Salesforce Trust

September 04, 2025

• Node.js 20.19.5 is now available
• PHP updates - Early September 2025

September 02, 2025

• Changes to Heroku Postgres credentials naming requirements

August 29, 2025

• Node.js 24.7.0 and 22.19.0 now available

August 26, 2025

• Heroku-22 and Heroku-24 stacks updated
• Python buildpacks updated to uv 0.8.13

August 22, 2025

• LlamaIndex AI integration now available

August 19, 2025

• Heroku AI now supports Amazon Nova Lite and Nova Pro models

August 15, 2025

• Node.js 24.6.0 is now available
• Python 3.13.7 is now available

August 14, 2025

• Go 1.25.0 is now available