.slick-grid-center-vertically .slick-track {
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-align-items: center;
    -ms-flex-align: center;
    -ms-align-items: center;
    align-items: center;
}
.slick-grid-center-vertically .slick-track .slick-slide {
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    height: auto;
    -webkit-align-items: center;
    -ms-flex-align: center;
    -ms-align-items: center;
    align-items: center;
    -webkit-justify-content: center;
    -ms-justify-content: center;
    -ms-justify-content: center;
    justify-content: center;
}