diff --git a/client/components/App.vue b/client/components/App.vue
index 70ae5c23..44859c56 100644
--- a/client/components/App.vue
+++ b/client/components/App.vue
@@ -128,6 +128,10 @@ class App extends Vue {
 
         this.setAppTitle();
         (async() => {
+            //запросим persistent storage
+            if (navigator.storage && navigator.storage.persist) {
+                navigator.storage.persist();
+            }
             await this.routerReady();
             this.redirectIfNeeded();
         })();
diff --git a/client/components/Reader/share/bookManager.js b/client/components/Reader/share/bookManager.js
index 607bc129..d9196ac7 100644
--- a/client/components/Reader/share/bookManager.js
+++ b/client/components/Reader/share/bookManager.js
@@ -4,7 +4,7 @@ import _ from 'lodash';
 import * as utils from '../../../share/utils';
 import BookParser from './BookParser';
 
-const maxDataSize = 300*1024*1024;//compressed bytes
+const maxDataSize = 500*1024*1024;//compressed bytes
 
 //локальный кэш метаданных книг, ограничение maxDataSize
 const bmMetaStore = localForage.createInstance({