Just add the lines below to the "_metronic/assets/sass/init.scss". the order is important. // Bootstrap initializaton @import "~bootstrap/scss/functions"; @import "~bootstrap/scss/variables"; @import "~bootstrap/scss/maps"; @import "~bootstrap/scss/mixins"; @import "~bootstrap/scss/utilities"; @import "~bootstrap/scss/helpers"; @import "~bootstrap/scss/utilities/api";