ST-2026-133 · Runtimes & developer platforms
App Engine blocks new deployments to the Go 1.11 runtime
Google App Engine no longer accepts deployments to the deprecated Go 1.11 runtime, including deployments previously re-enabled through an organisation-policy exception, while existing applications continue running and receiving traffic.
Previous state
Organisation policy could permit continued deployment to the legacy App Engine Go 1.11 runtime.
Current state
New deployments to Go 1.11 are blocked; existing Go 1.11 applications continue to run and serve traffic.
Affected users
Who needs to care
App Engine standard applications and deployment pipelines that still target the Go 1.11 runtime.
Required response
What to do
Migrate source and build configuration to a supported Go runtime, test compatibility and avoid relying on the former legacy-runtime policy exception.
Evidence boundary
What the source does not prove
This lifecycle event applies to the Google-managed App Engine Go 1.11 runtime. It does not mean the Go language version stops functioning in every environment or that existing applications are immediately shut down.
Lifecycle history
Dated event sequence
- Deployment block effective
App Engine stopped accepting new Go 1.11 deployments while existing applications continued serving traffic.
Evidence ledger
First-party sources
- 01Google Cloud — App Engine standard Go release notes
Official runtime release notes · 2026-01-31
Open official source ↗