diff --git a/src/routes/sample.ts b/src/routes/sample.ts
index 8a82071..e50ceac 100644
--- a/src/routes/sample.ts
+++ b/src/routes/sample.ts
@@ -400,6 +400,7 @@ router.get('/samples', async (req, res, next) => {
         csv(_.compact(data.map(e => SampleValidate.output(e, 'refs', measurementFields))), (err, data) => {
           if (err) return next(err);
           res.set('Content-Type', 'text/csv');
+          res.set('Content-Disposition', 'attachment; filename="samples.csv"');
           res.send(data);
         });
       }