.slick-prev, .slick-next {
    width: 40px;
    height: 40px;
    z-index: 1;
}
.slick-prev:before, .slick-next:before {
    font-size: 32px;
    color: #333333;
}
.slick-prev {
    left: 0;
}
.slick-next {
    right: 0;
}