How to get response in JSON format from SharePoint 2013 on-premise REST API?

Hi,

I have installed SharePoint 2013 OnPremise, but I am able to get response in the XML format only. Adding header accept : application/json sending me response in XML format instead of JSON, whereas on On-Cloud SharePoint I am able to receive both XML and JSON response.

How would I get JSON response on the On-Premise SharePoint 2013 instance? Do I need to configure something?

Thanks