Michelle Peot

Beginning at 06:00 UTC on Tuesday, Jun 10, 2025, Heroku customers began experiencing a platform service disruption due to an unintended system update applied to our production infrastructure by our vendor. To compound the issue, the Heroku Status site was affected by the outage. Shortcomings in site design and API latency resulted in timeouts, and the Status site appeared as if there were no active incidents.

On June 15th we published a summary of our initial investigation, mitigation, and root cause analysis. We also identified the following post-incident remediation objectives:

• Ensuring immutable infrastructure
• Increasing resilience of communication channels
• Accelerating investigation and recovery

As promised, we are providing a status update of our continued corrective actions.

We’re excited to announce that Heroku Autoscaling is now generally available for apps using web dynos.

We’ve always made it seamless and simple to scale apps on Heroku – just move the slider. But we want to go further, and help you in the face of unexpected demand spikes or intermittent activity. Part of our core mission is delivering a first-class operational experience that provides proactive notifications, guidance, and—where appropriate—automated responses to particular application events. Today we take another big step forward in that mission with the introduction of Autoscaling.

Autoscaling makes it effortless to…