diff --git a/src/Mod/Web/App/AppWeb.cpp b/src/Mod/Web/App/AppWeb.cpp
index 6dc1b479be..41bc08c725 100644
--- a/src/Mod/Web/App/AppWeb.cpp
+++ b/src/Mod/Web/App/AppWeb.cpp
@@ -158,7 +158,7 @@ private:
 
         Py::Object pyobj(obj);
         if (pyobj.isNone())
-            Web::Firewall::setInstance(0);
+            Web::Firewall::setInstance(nullptr);
         else
             Web::Firewall::setInstance(new Web::FirewallPython(pyobj));
 
diff --git a/src/Mod/Web/App/Server.cpp b/src/Mod/Web/App/Server.cpp
index 1e2a3de8e1..f1ece0d26d 100644
--- a/src/Mod/Web/App/Server.cpp
+++ b/src/Mod/Web/App/Server.cpp
@@ -36,7 +36,7 @@
 
 using namespace Web;
 
-Firewall* Firewall::instance = 0;
+Firewall* Firewall::instance = nullptr;
 
 Firewall* Firewall::getInstance()
 {
diff --git a/src/Mod/Web/Gui/AppWebGui.cpp b/src/Mod/Web/Gui/AppWebGui.cpp
index 6277307431..5fd356ae84 100644
--- a/src/Mod/Web/Gui/AppWebGui.cpp
+++ b/src/Mod/Web/Gui/AppWebGui.cpp
@@ -107,7 +107,7 @@ private:
             PyMem_Free(TabName);
         }
 
-        WebGui::BrowserView* pcBrowserView = 0;
+        WebGui::BrowserView* pcBrowserView = nullptr;
         pcBrowserView = new WebGui::BrowserView(Gui::getMainWindow());
         pcBrowserView->resize(400, 300);
         pcBrowserView->setHtml(QString::fromUtf8(HtmlCode),QUrl(QString::fromLatin1(BaseUrl)));
@@ -133,7 +133,7 @@ private:
             PyMem_Free(TabName);
         }
 
-        WebGui::BrowserView* pcBrowserView = 0;
+        WebGui::BrowserView* pcBrowserView = nullptr;
         pcBrowserView = new WebGui::BrowserView(Gui::getMainWindow());
         pcBrowserView->resize(400, 300);
         pcBrowserView->setWindowTitle(QString::fromUtf8(EncodedName.c_str()));
@@ -158,7 +158,7 @@ PyMOD_INIT_FUNC(WebGui)
 {
     if (!Gui::Application::Instance) {
         PyErr_SetString(PyExc_ImportError, "Cannot load Gui module in console application.");
-        PyMOD_Return(0);
+        PyMOD_Return(nullptr);
     }
 
     PyObject* mod = WebGui::initModule();
diff --git a/src/Mod/Web/Gui/BrowserView.cpp b/src/Mod/Web/Gui/BrowserView.cpp
index c58f0c0e56..1d400fe34d 100644
--- a/src/Mod/Web/Gui/BrowserView.cpp
+++ b/src/Mod/Web/Gui/BrowserView.cpp
@@ -429,7 +429,7 @@ TYPESYSTEM_SOURCE_ABSTRACT(WebGui::BrowserView, Gui::MDIView)
  *  name 'name'.
  */
 BrowserView::BrowserView(QWidget* parent)
-    : MDIView(0,parent,Qt::WindowFlags()),
+    : MDIView(nullptr,parent,Qt::WindowFlags()),
       WindowParameter( "Browser" ),
       isLoading(false)
 {
diff --git a/src/Mod/Web/Gui/BrowserView.h b/src/Mod/Web/Gui/BrowserView.h
index 75f7640013..cb5b8dea00 100644
--- a/src/Mod/Web/Gui/BrowserView.h
+++ b/src/Mod/Web/Gui/BrowserView.h
@@ -54,7 +54,7 @@ class WebGuiExport WebView : public QWebView
     Q_OBJECT
 
 public:
-    WebView(QWidget *parent = 0);
+    WebView(QWidget *parent = nullptr);
 
 protected:
     void mousePressEvent(QMouseEvent *event);
diff --git a/src/Mod/Web/Gui/CookieJar.h b/src/Mod/Web/Gui/CookieJar.h
index 425612eb44..d79788b201 100644
--- a/src/Mod/Web/Gui/CookieJar.h
+++ b/src/Mod/Web/Gui/CookieJar.h
@@ -37,7 +37,7 @@ namespace WebGui {
         Q_OBJECT
 
     public:
-        FcCookieJar(QObject* parent = 0);
+        FcCookieJar(QObject* parent = nullptr);
         virtual ~FcCookieJar();
         virtual bool setCookiesFromUrl(const QList<QNetworkCookie>&, const QUrl&);