diff --git a/src/adaptors/UBExportFullPDF.cpp b/src/adaptors/UBExportFullPDF.cpp
index 90439781..9ac220e1 100644
--- a/src/adaptors/UBExportFullPDF.cpp
+++ b/src/adaptors/UBExportFullPDF.cpp
@@ -82,7 +82,55 @@ void UBExportFullPDF::saveOverlayPdf(UBDocumentProxy* pDocumentProxy, const QStr
     if (!pDocumentProxy || filename.length() == 0 || pDocumentProxy->pageCount() == 0)
         return;
 
-    mSimpleExporter->persistsDocument(pDocumentProxy, filename);
+    //PDF
+        qDebug() << "exporting document to PDF Merger" << filename;
+        QPrinter pdfPrinter;
+
+        pdfPrinter.setOutputFormat(QPrinter::PdfFormat);
+        pdfPrinter.setResolution(UBSettings::settings()->pdfResolution->get().toInt());
+        pdfPrinter.setOutputFileName(filename);
+        pdfPrinter.setFullPage(true);
+
+        QPainter* pdfPainter = 0;
+
+        for(int pageIndex = 0 ; pageIndex < pDocumentProxy->pageCount(); pageIndex++)
+        {
+            UBGraphicsScene* scene = UBPersistenceManager::persistenceManager()->loadDocumentScene(pDocumentProxy, pageIndex);
+            // set background to white, no grid for PDF output
+            bool isDark = scene->isDarkBackground();
+            UBPageBackground pageBackground = scene->pageBackground();
+            scene->setBackground(false, UBPageBackground::plain);
+
+            // set high res rendering
+            scene->setRenderingQuality(UBItem::RenderingQualityHigh, UBItem::CacheNotAllowed);
+            scene->setRenderingContext(UBGraphicsScene::PdfExport);
+
+            QSize pageSize = scene->nominalSize();
+
+            UBGraphicsPDFItem *pdfItem = qgraphicsitem_cast<UBGraphicsPDFItem*>(scene->backgroundObject());
+
+            if (pdfItem) mHasPDFBackgrounds = true;
+
+            pdfPrinter.setPaperSize(QSizeF(pageSize.width()*mScaleFactor, pageSize.height()*mScaleFactor), QPrinter::Point);
+
+            if (!pdfPainter) pdfPainter = new QPainter(&pdfPrinter);
+
+            if (pageIndex != 0) pdfPrinter.newPage();
+
+            //render to PDF
+            scene->setDrawingMode(true);
+            scene->render(pdfPainter, QRectF(), scene->normalizedSceneRect());
+
+            //restore screen rendering quality
+            scene->setRenderingContext(UBGraphicsScene::Screen);
+            scene->setRenderingQuality(UBItem::RenderingQualityNormal, UBItem::CacheAllowed);
+
+            //restore background state
+            scene->setDrawingMode(false);
+            scene->setBackground(isDark, pageBackground);
+        }
+
+        if (pdfPainter) delete pdfPainter;
 }
 
 
diff --git a/src/pdf-merger/Parser.cpp b/src/pdf-merger/Parser.cpp
index 78062d9f..6070fe03 100644
--- a/src/pdf-merger/Parser.cpp
+++ b/src/pdf-merger/Parser.cpp
@@ -142,7 +142,14 @@ void Parser::_getFileContent(const char * fileName)
    {
       verPos += strlen(header);
       char ver = _fileContent[verPos];
-      if( ver < '0' || ver > '4' )
+      /* As every previous standard is contained in newer ones, a lot of documents that would not use
+       * features > 1.4 are probably correctly exportable. Some optimizations and fixes have been added since 1.4, but after some tests I didn't encountered any issues.
+       * As an attempt (until 1.5 to 1.7 version can be really supported)to measure what would be the impact of using this library as-is,
+       * we allow document with version > 1.4 to be parsed by it.
+       * The big advantage to using it is that exported PDFs are real PDFs (with searchable content), not heavy images.
+       * If an exception is thrown, actual behavior (heavy images) is used.
+      */
+      if( ver < '0' || ver > '7' )
       {
          stringstream errorMsg;
          errorMsg<<" File with verion 1."<<ver<<" is not currently supported by merge library\n";