Specify image dimensions

I really like your plugin. GTMetrix however has one complain:

The following image(s) are missing width and/or height attributes:

https://paleosmak.pl/wp-content/plugins/soslider-social-slider/handlers/facebook/imgs/5_right.png (Dimensions: 48 x 48)

Is there anything you can do about it?

Thank you in advance.

https://www.ads-software.com/plugins/soslider-social-slider/