diff --git a/app/views/fluentd/settings/edit.html.haml b/app/views/fluentd/settings/edit.html.haml
index 3783a65..2bde745 100644
--- a/app/views/fluentd/settings/edit.html.haml
+++ b/app/views/fluentd/settings/edit.html.haml
@@ -2,7 +2,7 @@
 
 = form_tag(daemon_setting_path(@fluentd), method: :patch) do
   .form-group
-    = text_area_tag "config", @config, class: "form-control", rows: 40, class: "js-fluentd-config-editor"
+    = text_area_tag "config", @config, class: "form-control js-fluentd-config-editor", rows: 40
   %p.text.text-danger= t('terms.notice_restart_for_config_edit', brand: fluentd_ui_brand)
   = submit_tag t("terms.update"), class: "btn btn-primary"
   = submit_tag t("terms.configtest"), class: "btn btn-default", name: "dryrun"