diff --git a/client/api/reader.js b/client/api/reader.js
index 47b61c6e..6149a1fc 100644
--- a/client/api/reader.js
+++ b/client/api/reader.js
@@ -171,7 +171,7 @@ class Reader {
         //получение файла
         estSize = (estSize > 0 ? estSize : 1000000);
         const options = {
-            onDownloadProgress: progress => {
+            onDownloadProgress: (progress) => {
                 while (progress.loaded > estSize) estSize *= 1.5;
 
                 if (callback)