diff --git a/share.py b/share.py
index 8fd810f..eef99be 100755
--- a/share.py
+++ b/share.py
@@ -722,7 +722,7 @@ def do_put(self):
 
     def respond_for_archive(self, dir):
         self.send_response(HTTPStatus.OK)
-        self.send_content_type('application/octet-stream')
+        self.send_content_type('application/zip')
         self.send_transfer_encoding('chunked')
         self.end_headers()
         with ChunkWriter(self.wfile) as writer: