diff --git a/packages/db/elastic_migrations/index_settings.json b/packages/db/elastic_migrations/index_settings.json
index 6b14fd5ce..6f0ec9bc3 100644
--- a/packages/db/elastic_migrations/index_settings.json
+++ b/packages/db/elastic_migrations/index_settings.json
@@ -159,6 +159,10 @@
         "type": "keyword",
         "normalizer": "lowercase_normalizer"
       },
+      "rssFeedUrl": {
+        "type": "keyword",
+        "normalizer": "lowercase_normalizer"
+      },
       "state": {
         "type": "keyword"
       },