Dialogflow fulfilment webhook url support self signed certificates?

I am using Dialogflow fulfilment webhook for weather.

Dialogflow says "You can use only https:// in fulfillment url when "Google Assistant" integration enabled"

so, I tried Self-Signed certificates for https url. but I can't get webhook response.

I can't use Self-Signed certificates for webhook url?

thank you for anyhelp!

Solution

I found the answer myself after I have tried for 7 days.

Dialogflow fulfilment webhook url doesn't support self signed certificates.

so, I used heroku and aws lambda.

they support https and worked fine with Dialogflow webhook.

I hope it will be helpful for everyone.