diff --git a/app/views/admin/asks/_ask_setting.html.erb b/app/views/admin/asks/_ask_setting.html.erb
index b1daf4a..cba2128 100644
--- a/app/views/admin/asks/_ask_setting.html.erb
+++ b/app/views/admin/asks/_ask_setting.html.erb
@@ -160,7 +160,7 @@
         <td>
           <%= t("ask.usage_rule") %>
         </td>
-        <td colspan="2">
+        <td colspan="2" style="width: 0;overflow: overlay;">
           <%= f.text_area "usage_rule",class: 'ckeditor'  %>
         </td>
       </tr>