diff --git a/src/main/java/org/ladocuploader/app/cli/SubmissionTransfer.java b/src/main/java/org/ladocuploader/app/cli/SubmissionTransfer.java
index 4d411e554..924d3e10e 100644
--- a/src/main/java/org/ladocuploader/app/cli/SubmissionTransfer.java
+++ b/src/main/java/org/ladocuploader/app/cli/SubmissionTransfer.java
@@ -117,7 +117,7 @@ private void transferSubmissionBatch(List<Submission> submissionsBatch) {
     String batchSeq = Long.toString(transmissionRepository.nextValueBatchSequence());
     String batchIndex = Strings.padStart(batchSeq, BATCH_INDEX_LEN, '0');
     UUID uuid = UUID.randomUUID();
-    String zipFileName = batchIndex + ".zip";
+    String zipFileName = batchIndex + ".zip.gpg";
     log.info(String.format("Beginning transfer of %s: batch %s", uuid, batchIndex));
 
     // Stats on transfers