heroku-16

Heroku-16 stack based on Ubuntu 16.04 - END OF LIFE

⚠️ End of Life Notice

Heroku-16 reached end of life on May 1, 2021.

Overview

Heroku-16 was based on Ubuntu 16.04 LTS (Xenial Xerus).

Support Timeline

  • Release: 2016
  • Deprecated: December 11, 2020
  • End of Life: May 1, 2021
  • Build Cutoff: June 1, 2021

Post-EOL Status

  • Existing apps continue to run at customer’s own risk
  • No security updates since May 1, 2021
  • No new builds/deployments allowed since June 1, 2021
  • No technical support available

Critical Action Required

Applications on Heroku-16 are critically outdated (4+ years unsupported) and represent a severe security risk.

Immediate upgrade to Heroku-24 is essential for security, compliance, and operational stability.

Migration Path

Direct upgrade to Heroku-24 is strongly recommended. Given the age of this stack, significant application updates will likely be required.

References

Last modified February 5, 2026: Adds proposal summary (2c393ca)