We have released major version 5.0.0 of the Checkly agent to support runtime 2025.04 on private locations.

Runtime 2025.04 uses Playwright 1.51.1 and Node.js v22.11.0, and include updates to a number of the supported libraries. For the full runtime specifications see our docs.

This release also includes a number of bug fixes and smaller improvements and we recommend upgrading to use the latest runtime and agent to get the best Checkly experience possible.

Detailed changes:

• New: Support for runtime 2025.04 and Node.js v22.11.0

• New: Support for fetch (Node.js documentation)

• Fix: Allow empty password for simple authentication

• Fix: Proper OOM handling for better check error reporting

• Fix: Improved garbage collection for better memory utilization

• Fix: Pins the Chrome version used to 131.0.6778.69 for increased stability

• Fix: Support for OS-level DNS resolution in TCP checks via USE_OS_DNS_RESOLVER environment variable

As each Checkly agent only supports a single runtime, we recommend pinning the version that supports the runtime you need when using private locations in production. Read all about updating the agent here.

Happy monitoring!

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