Omit image size in markdown

I’m compiling for (multi)markdown and then using Pandoc to create a PDF. My problem is that the resulting images are too wide, which breaks my PDF layout.

I can add the images manually in my text and everything works:


However I would like to be able to see the images in my editor while working. But, if I embed or link the images Scrivener outputs this:

[myimage]: myimage.jpg {width=2000 height=2000}

Is there a way to prevent Scrivener from adding the size information? Or some other solution to this?