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Workflow Engine 20.0.9

April 17, 2026

Overview​

Workflow Engine 20.0.9 is a maintenance release focused on a Core licensing fix, Workflow Designer strict-mode reliability, and clearer license-key registration guidance for Workflow Engine Core and Workflow Engine Web API deployments.

Why update​

  • Fix license restriction parsing when your application configures global Newtonsoft.Json settings such as JsonConvert.DefaultSettings.
  • Avoid incorrect license-limit behavior caused by JSON naming strategies that interfere with Workflow Engine license metadata deserialization.
  • Restore property forms in Workflow Designer strict-mode builds for templates that were failing to open or update correctly.
  • Get clearer guidance for registering a Workflow Engine license key in both Core-only and Web API-based installations.

Key features​

  • Core license restriction loading now ignores incompatible global Newtonsoft.Json serializer settings.
  • Workflow Designer strict mode now opens affected property forms correctly.
  • Documentation now clarifies how to register a license key for Workflow Engine Core and Workflow Engine Web API scenarios.

Changelog​

Update instructions​

  • All packages: update Workflow Engine packages to version 20.0.9.
  • If your application sets global Newtonsoft.Json defaults, update to 20.0.9 to ensure Workflow Engine reads license restrictions correctly.
  • If you use Workflow Designer strict entrypoint, update to 20.0.9 to restore affected activity property forms.
  • If you use Workflow Engine Core or Workflow Engine Web API and rely on public setup instructions, review the updated license-key guidance after upgrading.
  • No database migration or other package-specific migration steps are required for this release.

Enhancements​

  • Documentation: clarified license-key registration steps for Workflow Engine Core and Workflow Engine Web API deployment scenarios.

Bug fixes​

  • Core: fixed license restriction loading so global Newtonsoft.Json settings, including custom contract resolvers such as CamelCasePropertyNamesContractResolver, no longer break license metadata deserialization.
  • Designer: fixed strict entrypoint property forms.

Resources​

🔑 Get Trial Key

Alternatively, you can use an AI agent (Claude, Codex, GitHub Copilot, Cursor, or similar) to generate a trial key automatically. Provide the agent with the contents of trial.workflowengine.io/llms.txt and follow the instructions.

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