diff --git a/backend/appsettings/index_mapping.json b/backend/appsettings/index_mapping.json
index eaeaf325..03d43deb 100644
--- a/backend/appsettings/index_mapping.json
+++ b/backend/appsettings/index_mapping.json
@@ -110,6 +110,10 @@
                     "type": "text",
                     "index": false
                 },
+                "vid_thumb_base64": {
+                    "type": "text",
+                    "index": false
+                },
                 "date_downloaded": {
                     "type": "date",
                     "format": "epoch_second"