diff --git a/static/js/services/string-builder-service.js b/static/js/services/string-builder-service.js
index cb5ba19f1..949fd424a 100644
--- a/static/js/services/string-builder-service.js
+++ b/static/js/services/string-builder-service.js
@@ -34,7 +34,7 @@ angular.module('quay').factory('StringBuilderService', ['$sce', 'UtilService', f
 
     'updated_tags': function(value) {
       if (!value) { return []; }
-      return Object.getOwnPropertyNames(value);
+      return value.join(', ');
     },
 
     'kid': function(kid, metadata) {