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trigger.dev v4.5.5

Upgrade

:::sh
npx trigger.dev@latest update  # npm
pnpm dlx trigger.dev@latest update  # pnpm
yarn dlx trigger.dev@latest update  # yarn
bunx trigger.dev@latest update  # bun

Self-hosted Docker image: ghcr.io/triggerdotdev/trigger.dev:v4.5.5 (github.com)

Release notes

Read the full release notes: https://trigger.dev/changelog/v4-5-5

What's changed

Improvements

  • Add experimental Node.js 24 and 26 task runtimes. Set runtime to experimental-node-24 or experimental-node-26 in trigger.config.ts. (#4085)
  • Add defaultRegion to the project GET and list API responses; null when unset. (#4146)

Server changes

These changes affect the self-hosted Docker image and Trigger.dev Cloud:

  • Transient internal sync failures are now retried quietly instead of surfacing as errors. (#4270)
  • Optionally route ClickHouse read traffic to a read replica while writes stay on the primary. Set CLICKHOUSE_READER_URL to move all reads, or target the busiest paths with RUNS_LIST_CLICKHOUSE_URL (runs list) and EVENTS_READER_CLICKHOUSE_URL (traces, spans, logs). All optional; unset keeps current behavior. (#4081)
  • Remove the deprecated realtime stream write endpoint used by retired v3 task clients. (#4250)
  • Fix batchTrigger requests that set a per-item idempotency key failing with an error instead of creating and deduplicating the runs (#4271)
  • Speed up idempotency checks on batchTrigger calls that use idempotency keys. Large batches against a task with a big run history no longer degrade to multi-second lookups. (#4255)
  • The "Preview branches" usage on the Limits page now counts only preview branches. (#4283)
  • Avoid opening a redundant database connection pool when the legacy and primary databases are the same server, preventing connection usage from doubling. (#4253)
  • Fix pages occasionally loading unstyled or failing to load during a deploy. The dashboard now reloads automatically to recover. (#4282)

All packages: v4.5.5

@trigger.dev/build, @trigger.dev/core, @trigger.dev/python, @trigger.dev/react-hooks, @trigger.dev/redis-worker, @trigger.dev/rsc, @trigger.dev/schema-to-json, @trigger.dev/sdk, trigger.dev

Contributors

Chris Arderne, @nicktrn, @d-cs, Eric Allam, github-actions[bot], @isshaddad, Katia Bulatova, Matt Aitken

Full changelog: https://github.com/triggerdotdev/trigger.dev/compare/v4.5.4...v4.5.5

Source: README.md, updated 2026-07-20