How to upload file bigger than 8M in laravel

public function store(Request $request)
{
    $file = $request->file('file');
    $new_name = rand() . '.' . $file->getclientOriginalExtension();
    $filesize = $request->file('file')->getSize();
    $file->move(public_path('videos'), $new_name);
    $id = Auth::user()->id;
    $datasave = new home_contents();
    $datasave->img = $new_name;
    $datasave->created_id = $id;
    $datasave->updated_id = $id;
    $datasave->save();
}

So please share me how fix it . Best regard, Lab

via Chebli Mohamed