Bootstrap pagination-sm with DataTables

I would like to have my Datatables pagination styled like the Bootstrap pagination.

So, at the moment it looks like this:

If I add

<script src="https://cdn.datatables.net/1.10.23/js/dataTables.bootstrap.min.js"></script>

it looks like this:

And I want it to look like this:

I don't know why the additional js-file causes this distance between the buttons.

I would really appreciate any help!

from Bootstrap pagination-sm with DataTables