How to make your accordion have dropdownlist at the end?

<!-- Card body -->
                <div id="accordion">
                    <div class="card">
                        <div class="card-header" id="headingOne">
                            <h5 class="mb-0">
                                <button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true"
                                        aria-controls="collapseOne">
                                    Collapsible Group Item #1
                                </button>
                            </h5>
                        </div>
                        <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion">
                            <div class="card-body">
                                <div class="dropdown show">
                                    <a class="btn btn-secondary dropdown-toggle" href="#" role="button" id="dropdownMenuLink"
                                       data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                        Dropdown link
                                    </a>
                                    <div class="dropdown-menu" aria-labelledby="dropdownMenuLink">
                                        <a class="dropdown-item" href="#">Action</a>
                                        <a class="dropdown-item" href="#">Another action</a>
                                        <a class="dropdown-item" href="#">Something else here</a>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>