diff --git a/templates/certificate_detail.html b/templates/certificate_detail.html
index 258983e..6be3227 100644
--- a/templates/certificate_detail.html
+++ b/templates/certificate_detail.html
@@ -80,7 +80,7 @@
                     {% endif %}
 
                     <dt class="col-sm-4">创建者</dt>
-                    <dd class="col-sm-8">{{ cert.created_by }}</dd>
+                    <dd class="col-sm-8">{{ get_username(ca.created_by) }}</dd>
 
                     <dt class="col-sm-4">创建时间</dt>
                     <dd class="col-sm-8">{{ cert.created_at.strftime('%Y-%m-%d %H:%M') }}</dd>