diff --git a/server/core/Reader/ReaderWorker.js b/server/core/Reader/ReaderWorker.js
index b44061dc..2529f231 100644
--- a/server/core/Reader/ReaderWorker.js
+++ b/server/core/Reader/ReaderWorker.js
@@ -30,7 +30,7 @@ class ReaderWorker {
 
             this.workerState = new WorkerState();
             this.down = new FileDownloader(config.maxUploadFileSize);
-            this.decomp = new FileDecompressor(2*config.maxUploadFileSize);
+            this.decomp = new FileDecompressor(3*config.maxUploadFileSize);
             this.bookConverter = new BookConverter(this.config);
 
             this.remoteWebDavStorage = false;