diff --git a/app/assets/javascripts/admin/templates/customize-themes-edit.hbs b/app/assets/javascripts/admin/templates/customize-themes-edit.hbs
index b728480950e..fafce666a6f 100644
--- a/app/assets/javascripts/admin/templates/customize-themes-edit.hbs
+++ b/app/assets/javascripts/admin/templates/customize-themes-edit.hbs
@@ -59,9 +59,7 @@
       </ul>
     </div>
 
-    <div>
-      {{ace-editor content=activeSection editorId=editorId mode=activeSectionMode autofocus="true"}}
-    </div>
+    {{ace-editor content=activeSection editorId=editorId mode=activeSectionMode autofocus="true"}}
 
     <div class='admin-footer'>
       <div class='status-actions'>
diff --git a/app/assets/stylesheets/common/admin/customize.scss b/app/assets/stylesheets/common/admin/customize.scss
index cf656c9d939..9a62dcff919 100644
--- a/app/assets/stylesheets/common/admin/customize.scss
+++ b/app/assets/stylesheets/common/admin/customize.scss
@@ -129,7 +129,7 @@
         bottom: 10px;
       }
       .ace-wrapper {
-        height: 100%;
+        height: calc(100% - 200px);
       }
     }