OpenApi 3 support

I know SoapUI OS supports Swagger 2.  Are there plans to support OpenAPI 3 import specifications?  When I tried to replace the bundled plugin 'soapui-swagger-plugin-2.2-dist.jar' to 'soapui-swagger-plugin-2.5.3-dist.jar', I am getting the error "WARN:Plugin 'soapui-swagger-plugin-2.5.3-dist.jar' is not loaded because it hasn't been signed by SmartBear Software."

 

Is the solution only to go with ReadyAPI? Just want direction on the product roadmap.