Sharepoint 2013 workflow when listitem version changed

Question

I have a document library in share point 2013 foundation and I need to trigger a workflow to send email to the administrator only when the version of the listitem of document library was changed. I have a attached a workflow to the list item of document library when item was added and updated. I need to put a condition in the designer workflow to check whether the version of the document is changed or not. Can anyone help me on this please.

Thanks in Advance.