Sitemap not showing www on URLs

Hello! I have “The SEO framework” installed on my WordPress site. For SEO purposes, I’ve decided to use the URL with www. The problem is that on the sitemap generated by the plugin, the URLs are naked (without www).

I’ve tried by purging the cache of my site, re-installing the plugin, but it still doesn’t work. There is no option to change this from the settings of the plugin.

How can I solve this?

Thanks!

 

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