gzip (apparently) not working

Hi!

This plugin is super useful, thank you for that already!

Now, I’m testing my site speed across various tools, and all say the files generated by bwp-minify are not being gzipped. I understand from the plugin’s description that the plugin does it, so am wondering if there might be a bug?

site is http://www.comptacours.be
Tools used:
– google pagespeed
– yahoo YSlow
– Yellowlabs Tools : http://yellowlab.tools

https://ww.wp.xz.cn/plugins/bwp-minify/