diff --git a/imageslistview.h b/imageslistview.h
--- a/imageslistview.h
+++ b/imageslistview.h
@@ -50,7 +50,7 @@
   Q_OBJECT
 
 public:
-  ImagesListView(QWidget *parent);
+  explicit ImagesListView(QWidget *parent);
   ~ImagesListView() override;
 
   /**
diff --git a/kimagemapeditor.h b/kimagemapeditor.h
--- a/kimagemapeditor.h
+++ b/kimagemapeditor.h
@@ -72,7 +72,7 @@
 
 class HtmlElement {
 public:
-    HtmlElement(const QString & s) {
+    explicit HtmlElement(const QString & s) {
         htmlCode = s;
     };
     virtual ~HtmlElement() {}
@@ -93,7 +93,7 @@
 
 class HtmlImgElement : public HtmlElement {
 public:
-HtmlImgElement(const QString & s) : HtmlElement(s) {
+    explicit HtmlImgElement(const QString & s) : HtmlElement(s) {
       imgTag = 0L;
     };
     ~HtmlImgElement() override {}
diff --git a/kimagemapeditor.cpp b/kimagemapeditor.cpp
--- a/kimagemapeditor.cpp
+++ b/kimagemapeditor.cpp
@@ -896,7 +896,7 @@
     // The translated string must be divided into
     // parts with about the same size that fit to the image
     QString str = i18n("Drop an image or HTML file");
-    const QStringList strList = str.split(" ");
+    const QStringList strList = str.split(' ');
 
     // Get the string parts
     QString tmp;
@@ -1718,7 +1718,7 @@
   if (value.right(3)=="-->")
     return dict;
 
-  if (value.startsWith("!--")) {
+  if (value.startsWith(QLatin1String("!--"))) {
     while (!s.atEnd()) {
       s >> w;
       readText.append(w);
@@ -2326,7 +2326,7 @@
   {
     QString path = urlToConvert.path();
     QString basePath = baseURL.path().endsWith('/') ? baseURL.path() : baseURL.path() + '/';
-    if (path.startsWith("/") && basePath != "/")
+    if (path.startsWith(QLatin1String("/")) && basePath != "/")
     {
       path.remove(0, 1);
       basePath.remove(0, 1);
@@ -2875,7 +2875,7 @@
      // Update the htmlCode of the HtmlElement
      HtmlImgElement* imgEl = findHtmlImgElement(imageTag);
 
-     imgEl->htmlCode = "<";
+     imgEl->htmlCode = QLatin1String("<");
      QString tagName = imgEl->imgTag->value("tagname");
      imgEl->htmlCode += QString(tagName);
      QHashIterator<QString, QString> it( *imgEl->imgTag );
diff --git a/kimearea.cpp b/kimearea.cpp
--- a/kimearea.cpp
+++ b/kimearea.cpp
@@ -733,7 +733,7 @@
 {
 	_finished=true;
 
-	const QStringList list = s.split(",");
+	const QStringList list = s.split(',');
 	QRect r;
  	bool ok=true;
  	QStringList::ConstIterator it = list.begin();
@@ -913,7 +913,7 @@
 bool CircleArea::setCoords(const QString & s)
 {
 	_finished=true;
-	const QStringList list = s.split(",");
+	const QStringList list = s.split(',');
  	bool ok=true;
  	QStringList::ConstIterator it = list.begin();
  	int x=(*it).toInt(&ok,10);it++;
@@ -1158,7 +1158,7 @@
 bool PolyArea::setCoords(const QString & s)
 {
 	_finished=true;
-	const QStringList list = s.split(",");
+	const QStringList list = s.split(',');
 	_coords.clear();
 	_selectionPoints.clear();
 
diff --git a/kimeshell.h b/kimeshell.h
--- a/kimeshell.h
+++ b/kimeshell.h
@@ -29,7 +29,7 @@
   Q_OBJECT
 
 public:
-  KimeShell( const char *name=0 );
+  explicit KimeShell( const char *name=0 );
   ~KimeShell() override;
 
   void setStdout(bool b);
diff --git a/kimeshell.cpp b/kimeshell.cpp
--- a/kimeshell.cpp
+++ b/kimeshell.cpp
@@ -144,7 +144,6 @@
     // button is clicked
 
     // About this function, the style guide (
-    // http://developer.kde.org/documentation/standards/kde/style/basics/index.html )
     // says that it should open a new window if the document is _not_
     // in its initial state.  This is what we do here..
     if ( ! m_part->url().isEmpty() || m_part->isModified() )
@@ -178,7 +177,6 @@
                   "HTML Files (*.htm *.html);;All Files (*)"));
   if (!url.isEmpty()) {
         // About this function, the style guide (
-        // http://developer.kde.org/documentation/standards/kde/style/basics/index.html )
         // says that it should open a new window if the document is _not_
         // in its initial state.  This is what we do here..
         if ( m_part->url().isEmpty() && ! m_part->isModified() )
diff --git a/main.cpp b/main.cpp
--- a/main.cpp
+++ b/main.cpp
@@ -38,7 +38,7 @@
   KAboutData aboutData( "kimagemapeditor", i18n("KImageMapEditor"),
     KIMAGEMAPEDITOR_VERSION_STRING, i18n(description), KAboutLicense::GPL,
     i18n("(c) 2001-2007 Jan Schaefer"), QString(),
-    QStringLiteral("http://kde.org/applications/development/kimagemapeditor/"), QStringLiteral("janschaefer@users.sourceforge.net"));
+    QStringLiteral("https://kde.org/applications/development/org.kde.kimagemapeditor"), QStringLiteral("janschaefer@users.sourceforge.net"));
   aboutData.addAuthor(i18n("Jan Schaefer"),QString(), "janschaefer@users.sourceforge.net");
   aboutData.addCredit(i18n("Joerg Jaspert"),i18n("For helping me with the Makefiles, and creating the Debian package"));
   aboutData.addCredit(i18n("Aaron Seigo and Michael"),i18n("For helping me fixing --enable-final mode"));