How to convert icingaweb2 page to https with a internal certificate

Is there any way to convert the icingaweb http page to https with a certificate from internal CA server. i have tried to configure the by adding the SSL path in the conf file but its taking the self signed certificate.
is there any other place do we need to change the certificate path.? i have searched for a document or a blog and not able to find a working one, anyone can help me on this?