How to customize a v-btn without using !important?

[martinszeltins]

Maybe I'm missing something but when I try to apply my own class to a v-button the style doesn't show unless I add !important (which is a bad practice). How could I style just one component without using important?

<v-btn class="btn-add">
   Add todo
</v-btn>

.btn-add {
    height: 49px !important;
}