diff --git a/YACReaderLibrary/initial_comic_info_extractor.cpp b/YACReaderLibrary/initial_comic_info_extractor.cpp
index 2d889f4c..d25d84c4 100644
--- a/YACReaderLibrary/initial_comic_info_extractor.cpp
+++ b/YACReaderLibrary/initial_comic_info_extractor.cpp
@@ -27,38 +27,27 @@ void InitialComicInfoExtractor::extract()
 #ifndef NO_PDF
     if (fi.suffix().compare("pdf", Qt::CaseInsensitive) == 0) {
 #if defined Q_OS_MAC && defined USE_PDFKIT
-        MacOSXPDFComic *pdfComic = new MacOSXPDFComic();
+       auto pdfComic = std::make_unique<MacOSXPDFComic>();
         if (!pdfComic->openComic(_fileSource)) {
-            delete pdfComic;
-            // QImage p;
-            // p.load(":/images/notCover.png");
-            // p.save(_target);
             return;
         }
 #elif defined USE_PDFIUM
-        auto pdfComic = new PdfiumComic();
+        auto pdfComic = std::make_unique<PdfiumComic>();
         if (!pdfComic->openComic(_fileSource)) {
-            delete pdfComic;
             return;
         }
 #else
-        Poppler::Document *pdfComic = Poppler::Document::load(_fileSource);
+        auto _pdfComic = Poppler::Document::load(_fileSource);
+        auto pdfComic = std::unique_ptr<Poppler::Document>(_pdfComic);
 #endif
-
         if (!pdfComic) {
             QLOG_WARN() << "Extracting cover: unable to open PDF file " << _fileSource;
-            // delete pdfComic; //TODO check if the delete is needed
-            pdfComic = 0;
-            // QImage p;
-            // p.load(":/images/notCover.png");
-            // p.save(_target);
             return;
         }
 #if !defined USE_PDFKIT && !defined USE_PDFIUM
         // poppler only, not mac
         if (pdfComic->isLocked()) {
             QLOG_WARN() << "Extracting cover: unable to open PDF file " << _fileSource;
-            delete pdfComic;
             return;
         }
 #endif
@@ -75,11 +64,8 @@ void InitialComicInfoExtractor::extract()
                 saveCover(_target, p);
             } else if (_target != "") {
                 QLOG_WARN() << "Extracting cover: requested cover index greater than numPages " << _fileSource;
-                // QImage p;
-                // p.load(":/images/notCover.png");
-                // p.save(_target);
+
             }
-            delete pdfComic;
         }
         return;
     }
diff --git a/common/comic.cpp b/common/comic.cpp
index 69882fae..26b3949e 100644
--- a/common/comic.cpp
+++ b/common/comic.cpp
@@ -796,24 +796,22 @@ bool PDFComic::load(const QString &path, const ComicDB &comic)
 void PDFComic::process()
 {
 #if defined Q_OS_MAC && defined USE_PDFKIT
-    pdfComic = new MacOSXPDFComic();
+    pdfComic = std::make_unique<MacOSXPDFComic>();
     if (!pdfComic->openComic(_path)) {
-        delete pdfComic;
         emit errorOpening();
         return;
     }
 #elif defined USE_PDFIUM
-    pdfComic = new PdfiumComic();
+    pdfComic = std::make_unique<PdfiumComic>();
     if (!pdfComic->openComic(_path)) {
-        delete pdfComic;
         emit errorOpening();
         return;
     }
 #else
-    pdfComic = Poppler::Document::load(_path);
+    auto _pdfComic = Poppler::Document::load(_path);
+    pdfComic = std::unique_ptr<Poppler::Document>(_pdfComic);
+
     if (!pdfComic) {
-        // delete pdfComic;
-        // pdfComic = 0;
         moveToThread(QCoreApplication::instance()->thread());
         emit errorOpening();
         return;
@@ -824,7 +822,6 @@ void PDFComic::process()
         return;
     }
 
-    // pdfComic->setRenderHint(Poppler::Document::Antialiasing, true);
     pdfComic->setRenderHint(Poppler::Document::TextAntialiasing, true);
 #endif
 
@@ -853,7 +850,6 @@ void PDFComic::process()
     int buffered_index = _index;
     for (int i = buffered_index; i < nPages; i++) {
         if (_invalidated) {
-            delete pdfComic;
             moveToThread(QCoreApplication::instance()->thread());
             return;
         }
@@ -862,14 +858,12 @@ void PDFComic::process()
     }
     for (int i = 0; i < buffered_index; i++) {
         if (_invalidated) {
-            delete pdfComic;
             moveToThread(QCoreApplication::instance()->thread());
             return;
         }
         renderPage(i);
     }
 
-    delete pdfComic;
     moveToThread(QCoreApplication::instance()->thread());
     emit imagesLoaded();
 }
@@ -883,10 +877,9 @@ void PDFComic::renderPage(int page)
     QImage img = pdfComic->getPage(page);
     if (!img.isNull()) {
 #else
-    Poppler::Page *pdfpage = pdfComic->page(page);
+    std::unique_ptr<Poppler::Page> pdfpage (pdfComic->page(page));
     if (pdfpage) {
         QImage img = pdfpage->renderToImage(150, 150);
-        delete pdfpage;
 #endif
         QByteArray ba;
         QBuffer buf(&ba);
diff --git a/common/comic.h b/common/comic.h
index a64da6f5..9be08d43 100644
--- a/common/comic.h
+++ b/common/comic.h
@@ -165,11 +165,11 @@ class PDFComic : public Comic
 private:
 // pdf
 #if defined Q_OS_MAC && defined USE_PDFKIT
-    MacOSXPDFComic *pdfComic;
+    std::unique_ptr<MacOSXPDFComic> pdfComic;
 #elif defined USE_PDFIUM
-    PdfiumComic *pdfComic;
+    std::unique_ptr<PdfiumComic> pdfComic;
 #else
-    Poppler::Document *pdfComic;
+    std::unique_ptr<Poppler::Document> pdfComic;
 #endif
     void renderPage(int page);
     // void run();