Updating my Codeigniter to the latest version with gaps in between

Or is it safer/faster for me to just transfer all my files(controller/models/views/assets(js,css,images) from my 3.1.5 version to a newly downloaded 3.1.11 codeigniter version. As i have stated, i dont really have any third party libraries or helpers i used nor have i done any changes to the system files of codeigniter.

I think moving your files to 3.1.11 would be easier in your case.