table.dataTable thead th {
    position: relative;
    background-image: none !important;
}

table.dataTable thead th.sorting:after,
table.dataTable thead th.sorting_asc:after,
table.dataTable thead th.sorting_desc:after,
table.dataTable thead th.sorting:before,
table.dataTable thead th.sorting_asc:before,
table.dataTable thead th.sorting_desc:before{
    position: absolute !important;
    top: 12px !important;
    right: 8px !important;
    display: block !important;
    font-family: 'Font Awesome\ 5 Free' !important;
}
table.dataTable thead th.sorting:after,
table.dataTable thead th.sorting:before{
    content: "\f0dc" !important;
    color: #5e5e5e !important;
    font-size: 0.8em !important;
    padding-top: 0.12em !important;
}
table.dataTable thead th.sorting_asc:after,
table.dataTable thead th.sorting_asc:before{
    content: "\f0de" !important;
}
table.dataTable thead th.sorting_desc:after,
table.dataTable thead th.sorting_desc:before{
    content: "\f0dd" !important;
}