diff --git a/scripts/valgrind.sh b/scripts/valgrind.sh
new file mode 100755
index 0000000..684f14e
--- /dev/null
+++ b/scripts/valgrind.sh
@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+valgrind --leak-check=full --track-origins=yes ./build/bin/browser
\ No newline at end of file
diff --git a/src/mainwindow.cc b/src/mainwindow.cc
index c00341c..5def985 100644
--- a/src/mainwindow.cc
+++ b/src/mainwindow.cc
@@ -30,12 +30,12 @@ MainWindow::MainWindow()
     resize(600, 400);
     setWindowTitle("Browser");
 
-    QMenu *fileMenu = new QMenu("File");
-    fileMenu->addAction("Open...");
-    fileMenu->addAction("New...");
-    fileMenu->addAction("Exit");
+    QMenu fileMenu("File");
+    fileMenu.addAction("Open...");
+    fileMenu.addAction("New...");
+    fileMenu.addAction("Exit");
 
-    menuBar()->addMenu(fileMenu);
+    menuBar()->addMenu(&fileMenu);
 
     QWidget *centralWidget = new QWidget;
     setCentralWidget(centralWidget);
@@ -58,6 +58,16 @@ MainWindow::MainWindow()
     setupParser();
 }
 
+MainWindow::~MainWindow()
+{
+    delete scene;
+    delete view;
+    delete textEdit;
+    delete parser;
+    delete renderer;
+    delete menuBar();
+}
+
 void MainWindow::setupParser()
 {
     parser = new Parser();
diff --git a/src/mainwindow.h b/src/mainwindow.h
index f45f324..1cb76d0 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -18,15 +18,16 @@ class MainWindow : public QMainWindow
 
 public:
     MainWindow();
+    ~MainWindow();
     void setOutputToTextEdit(const QString& text);
 
 //private slots:
 //    void newFile();
 
 private:
+    Scene *scene;
     QGraphicsView *view;
     QTextEdit *textEdit;
-    Scene *scene;
     Parser *parser;
     QtRenderer *renderer;
 
diff --git a/src/qt-renderer.cc b/src/qt-renderer.cc
index 23e092a..a28f917 100644
--- a/src/qt-renderer.cc
+++ b/src/qt-renderer.cc
@@ -32,6 +32,11 @@ QtRenderer::QtRenderer():
     font->setFamily(fontFamilty);
 }
 
+QtRenderer::~QtRenderer()
+{
+    delete font;
+}
+
 void QtRenderer::setScene(Scene* scene)
 {
     this->scene = scene;
@@ -213,11 +218,11 @@ QRectF const QtRenderer::drawText(const QString& text)
     // We can still extend the QGraphicsSimpleTextItem class (or QAbstractGraphicsShapeItem) and override paint method.
     // Or just use QPainter with a paint device (like QWidgets), to have maximal control.
     QGraphicsSimpleTextItem *textItem = new QGraphicsSimpleTextItem(text);
-    //font->setBold(bold);
-    //font->setItalic(italic);
+    font->setBold(bold);
+    font->setItalic(italic);
 
     if (headingLevel > 0) {
-        //font->setBold(true);
+        font->setBold(true);
         switch(headingLevel) {
         case 1:
             font->setPixelSize(24);
diff --git a/src/qt-renderer.h b/src/qt-renderer.h
index 487cd3b..51ed7f0 100644
--- a/src/qt-renderer.h
+++ b/src/qt-renderer.h
@@ -18,6 +18,7 @@ class QtRenderer : public RendererI
 {
 public:
     explicit QtRenderer();
+    ~QtRenderer();
 
     void setScene(Scene *scene) override;
     void setUnknownYet() override {}; // No implementation
diff --git a/src/renderer-interface.h b/src/renderer-interface.h
index 734cc9e..71c5175 100644
--- a/src/renderer-interface.h
+++ b/src/renderer-interface.h
@@ -10,6 +10,7 @@ struct cmark_node;
 class RendererI
 {
 public:
+    virtual ~RendererI() {};
     // TODO: Combien those two sets to 1, create an abstract class for setting a scene in Qt and/or Imgui.
     virtual void setScene(Scene *scene) = 0;// For Qt
     virtual void setUnknownYet() = 0; // For Imgui