Heroku March 2026 Update

We’ve transitioned to a Sustaining Engineering model to better serve the customers who rely on us every day. Our mission is simple: to provide the most stable, secure, and reliable environment for your apps and data. We will continue releasing features and functionality that align with our Sustaining Engineering goals and provide a more robust and efficient platform to our customers.

Today we are excited to share three recent enhancements:

• 1GB slug limits: We’ve doubled the default compressed slug size from 500MB to 1GB to support complex libraries and AI/ML frameworks.
• Longer build timeouts: More flexibility for complex builds that need extra time to compile.
• Heroku CLI v11: A complete architectural move to ESM and oclif v4, delivering faster execution and better maintainability.

You can follow the Heroku Changelog to keep track of the work we do to keep your apps reliable and secure.