diff --git a/modules/route/back/methods/route/downloadCmrsZip.js b/modules/route/back/methods/route/downloadCmrsZip.js
index c6934edca4..895ff7a168 100644
--- a/modules/route/back/methods/route/downloadCmrsZip.js
+++ b/modules/route/back/methods/route/downloadCmrsZip.js
@@ -41,14 +41,16 @@ module.exports = Self => {
         if (typeof options == 'object')
             Object.assign(myOptions, options);
 
-        ids = ids.split(',');
-
-        for (const id of ids) {
+        const downloadAddZip = async id => {
             ctx.args = ctx.args || {};
             ctx.args.id = Number(id);
             const [data] = await models.Route.cmr(ctx, myOptions);
             zip.file(`${id}.pdf`, data, {binary: true});
-        }
+        };
+
+        ids = ids.split(',');
+        const promises = ids.map(id => downloadAddZip(id));
+        await Promise.all(promises);
         const zipStream = zip.generateNodeStream({streamFiles: true});
         return [zipStream, 'application/zip', `filename="cmrs.zip"`];
     };