diff --git a/app/assets/stylesheets/common.css.scss b/app/assets/stylesheets/common.css.scss
index 579521e..9e890e5 100644
--- a/app/assets/stylesheets/common.css.scss
+++ b/app/assets/stylesheets/common.css.scss
@@ -165,3 +165,7 @@ label {
     color: #999;
   }
 }
+
+.datetime {
+  white-space: nowrap;
+}
diff --git a/app/views/fluentd/settings/histories/_list.html.haml b/app/views/fluentd/settings/histories/_list.html.haml
index afd96b2..c99991c 100644
--- a/app/views/fluentd/settings/histories/_list.html.haml
+++ b/app/views/fluentd/settings/histories/_list.html.haml
@@ -7,8 +7,10 @@
   - @backup_files.each do |file|
     %tr
       %td= link_to(file.name, daemon_setting_history_path(id: file.file_id))
-      %td= file.ctime.strftime t('time.formats.default')
+      %td.datetime= file.ctime.strftime t('time.formats.default')
       %td
         = form_for :note, url: daemon_setting_note_path(id: file.note.file_id), method: :patch do |f|
-          = f.text_field :content, value: file.note.content, class: "note-content", id: nil
-          = submit_tag t('terms.save'), class: 'btn btn-default btn-sm pull-right'
+          .form-group.input-group
+            = f.text_field :content, value: file.note.content, class: "note-content form-control", id: nil
+            %span.input-group-btn
+              = submit_tag t('terms.save'), class: 'btn btn-default'