diff --git a/app/views/fluentd/settings/in_tail/after_file_choose.html.haml b/app/views/fluentd/settings/in_tail/after_file_choose.html.haml
index 0e6db65..6d966d6 100644
--- a/app/views/fluentd/settings/in_tail/after_file_choose.html.haml
+++ b/app/views/fluentd/settings/in_tail/after_file_choose.html.haml
@@ -12,7 +12,7 @@
     = f.text_field :path, class: "form-control", disabled: true
   = render "shared/vue/in_tail_parse", setting: @setting
 
-  .card
+  .card.mb-3
     %pre.card-body= file_tail(@setting.path, Settings.in_tail_preview_line_count).join("\n")
 
   %p