diff --git a/lib/elastic_search_helper.rb b/lib/elastic_search_helper.rb
index 6f24954..58f470c 100644
--- a/lib/elastic_search_helper.rb
+++ b/lib/elastic_search_helper.rb
@@ -29,6 +29,7 @@ class ElasticSearchHelper
                 "scrape_url": { "type": "text" },
                 "full_url": { "type": "text" },
                 "date": { "type": "text" },
+                "key": { "type": "text" },
                 "size": { "type": "text" },
                 "expire": { "type": "text" },
                 "title": { "type": "text" },