.bootstrap-select .dropdown-menu:not([data-animation]):not(.pull-right):not(.dropdown-menu-right), .btn-group .dropdown-menu:not([data-animation]):not(.pull-right):not(.dropdown-menu-right), .dropdown .dropdown-menu:not([data-animation]):not(.pull-right):not(.dropdown-menu-right) {
    -webkit-transform-origin: top left;
    transform-origin: top left;
    max-height: 300px;
    overflow-y: scroll;
    overflow-x: hidden;
}