Alertify height to bigger the window

Question

I am using Alertify. I have followed these instruction on how to set it up.

My problem is that the confirm dialog is bigger than the window. it is hard to reproduce this problem so I have uploaded a image. When I look at computed styles the height is at 100% and 933.33px. The problem might be that I have other styles interfering with the alertify css. Any ideas on how I can solve this? (When I add height:180px; to .alertify the confirm dialog is resized properly. But this feels like a not so good Idea. Here is my codesnippet:

 jQuery(".erase").on('click', function (index, value) {
       alertify.confirm("Vill du radera denna tid?", function (e) {
                        if (e) {
                            alertify.success("Tiden är raderad!");
                        } else {
                            alertify.error("Tiden raderades inte!");
                        }
                    });
                });

Image: