>Use the code given in the link:

 <system.webServer>
>    <staticContent>
>      <remove fileExtension=".woff" /> <!-- In case IIS already has this mime type -->
>      <mimeMap fileExtension=".woff" mimeType="application/x-font-woff" />
>    </staticContent>    
>  </system.webServer>

>

That code was already in web config. I just need the same for extension woff2.