diff --git a/client/api/reader.js b/client/api/reader.js
index 1088cf26..d8ca7348 100644
--- a/client/api/reader.js
+++ b/client/api/reader.js
@@ -1,7 +1,7 @@
 import axios from 'axios';
 import {sleep} from '../share/utils';
 
-const maxFileUploadSize = 10*1024*1024;
+const maxFileUploadSize = 50*1024*1024;
 const api = axios.create({
   baseURL: '/api/reader'
 });
diff --git a/server/core/FileDownloader.js b/server/core/FileDownloader.js
index 5e2a24cc..d816b07c 100644
--- a/server/core/FileDownloader.js
+++ b/server/core/FileDownloader.js
@@ -1,11 +1,12 @@
 const got = require('got');
 
+const maxDownloadSize = 50*1024*1024;
+
 class FileDownloader {
     constructor() {
     }
 
     async load(url, callback) {
-        const maxDownloadSize = 10*1024*1024;
         let errMes = '';
 
         const response = await got(url, {method: 'HEAD'});
diff --git a/server/routes.js b/server/routes.js
index 1bee3b3a..aa6014c0 100644
--- a/server/routes.js
+++ b/server/routes.js
@@ -2,6 +2,8 @@ const c = require('./controllers');
 const utils = require('./core/utils');
 const multer = require('multer');
 
+const maxUploadSize = 50*1024*1024;
+
 function initRoutes(app, connPool, config) {
     const misc = new c.MiscController(connPool, config);
     const reader = new c.ReaderController(connPool, config);
@@ -20,7 +22,7 @@ function initRoutes(app, connPool, config) {
             cb(null, utils.randomHexString(30));
         }
     });
-    const upload = multer({ storage, limits: {fileSize: 10*1024*1024} });    
+    const upload = multer({ storage, limits: {fileSize: maxUploadSize} });
 
     //routes
     const routes = [