diff --git a/node/src/handlers/get-file-set-download.js b/node/src/handlers/get-file-set-download.js
index 13c9d167..9c20f91e 100644
--- a/node/src/handlers/get-file-set-download.js
+++ b/node/src/handlers/get-file-set-download.js
@@ -112,9 +112,9 @@ async function getDownloadLink(doc) {
   const getObjectParams = {
     Bucket: bucket,
     Key: key,
-    ResponseContentDisposition: `attachment; filename=download.${mime.extension(
-      doc._source.mime_type
-    )}`,
+    ResponseContentDisposition: `attachment; filename=${
+      doc._source.accession_number
+    }.${mime.extension(doc._source.mime_type)}`,
   };
 
   const client = new S3Client(clientParams);