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

• License key information: License key.
• Web API setup: Workflow Engine Web API.
• Strict CSP deployment guide: How to satisfy strict CSP in Workflow Designer?.