diff --git a/autotests/data/fakeplugin.desktop b/autotests/data/fakeplugin.desktop
--- a/autotests/data/fakeplugin.desktop
+++ b/autotests/data/fakeplugin.desktop
@@ -84,7 +84,7 @@
 X-KDE-PluginInfo-Email=sebas@kde.org
 X-KDE-PluginInfo-Name=fakeplugin
 X-KDE-PluginInfo-Version=1.0
-X-KDE-PluginInfo-Website=http://kde.org/
+X-KDE-PluginInfo-Website=https://kde.org/
 X-KDE-PluginInfo-Category=Examples
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=LGPL
diff --git a/autotests/data/hiddenplugin.desktop b/autotests/data/hiddenplugin.desktop
--- a/autotests/data/hiddenplugin.desktop
+++ b/autotests/data/hiddenplugin.desktop
@@ -84,7 +84,7 @@
 X-KDE-PluginInfo-Email=sebas@kde.org
 X-KDE-PluginInfo-Name=fakeplugin
 X-KDE-PluginInfo-Version=1.0
-X-KDE-PluginInfo-Website=http://kde.org/
+X-KDE-PluginInfo-Website=https://kde.org/
 X-KDE-PluginInfo-Category=Examples
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=LGPL
diff --git a/autotests/data/twostepsparsetest.desktop b/autotests/data/twostepsparsetest.desktop
--- a/autotests/data/twostepsparsetest.desktop
+++ b/autotests/data/twostepsparsetest.desktop
@@ -13,7 +13,7 @@
 X-KDE-PluginInfo-Email=sebas@kde.org
 X-KDE-PluginInfo-Name=fakeplugin
 X-KDE-PluginInfo-Version=1.0
-X-KDE-PluginInfo-Website=http://kde.org/
+X-KDE-PluginInfo-Website=https://kde.org/
 X-KDE-PluginInfo-Category=Examples
 X-KDE-PluginInfo-Depends=
 X-KDE-PluginInfo-License=LGPL
diff --git a/autotests/kaboutdatatest.cpp b/autotests/kaboutdatatest.cpp
--- a/autotests/kaboutdatatest.cpp
+++ b/autotests/kaboutdatatest.cpp
@@ -188,7 +188,7 @@
     KAboutData data2("app", QLatin1String("program"), "version",
                      QLatin1String("description"), KAboutLicense::LGPL,
                      QLatin1String("copyright"), QLatin1String("hello world"),
-                     "http://edu.kde.org/kig");
+                     "https://edu.kde.org/kig");
     QCOMPARE(data2.organizationDomain(), QString::fromLatin1("kde.org"));
     QCOMPARE(data2.desktopFileName(), QStringLiteral("org.kde.app"));
 }
diff --git a/autotests/kmacroexpandertest.cpp b/autotests/kmacroexpandertest.cpp
--- a/autotests/kmacroexpandertest.cpp
+++ b/autotests/kmacroexpandertest.cpp
@@ -89,35 +89,35 @@
     QHash<QChar, QString> map2;
     map2.insert('a', "%n");
     map2.insert('f', "filename.txt");
-    map2.insert('u', "http://www.kde.org/index.html");
+    map2.insert('u', "https://www.kde.org/index.html");
     map2.insert('n', "Restaurant \"Chew It\"");
     s = "Title: %a - %f - %u - %n - %%";
     QCOMPARE(KMacroExpander::expandMacros(s, map2),
-             QLatin1String("Title: %n - filename.txt - http://www.kde.org/index.html - Restaurant \"Chew It\" - %"));
+             QLatin1String("Title: %n - filename.txt - https://www.kde.org/index.html - Restaurant \"Chew It\" - %"));
 
     QHash<QString, QString> smap;
     smap.insert("foo", "%n");
     smap.insert("file", "filename.txt");
-    smap.insert("url", "http://www.kde.org/index.html");
+    smap.insert("url", "https://www.kde.org/index.html");
     smap.insert("name", "Restaurant \"Chew It\"");
 
     s = "Title: %foo - %file - %url - %name - %";
     QCOMPARE(KMacroExpander::expandMacros(s, smap),
-             QLatin1String("Title: %n - filename.txt - http://www.kde.org/index.html - Restaurant \"Chew It\" - %"));
+             QLatin1String("Title: %n - filename.txt - https://www.kde.org/index.html - Restaurant \"Chew It\" - %"));
     s = "%foo - %file - %url - %name";
     QCOMPARE(KMacroExpander::expandMacros(s, smap),
-             QLatin1String("%n - filename.txt - http://www.kde.org/index.html - Restaurant \"Chew It\""));
+             QLatin1String("%n - filename.txt - https://www.kde.org/index.html - Restaurant \"Chew It\""));
 
     s = "Title: %{foo} - %{file} - %{url} - %{name} - %";
     QCOMPARE(KMacroExpander::expandMacros(s, smap),
-             QLatin1String("Title: %n - filename.txt - http://www.kde.org/index.html - Restaurant \"Chew It\" - %"));
+             QLatin1String("Title: %n - filename.txt - https://www.kde.org/index.html - Restaurant \"Chew It\" - %"));
     s = "%{foo} - %{file} - %{url} - %{name}";
     QCOMPARE(KMacroExpander::expandMacros(s, smap),
-             QLatin1String("%n - filename.txt - http://www.kde.org/index.html - Restaurant \"Chew It\""));
+             QLatin1String("%n - filename.txt - https://www.kde.org/index.html - Restaurant \"Chew It\""));
 
     s = "Title: %foo-%file-%url-%name-%";
     QCOMPARE(KMacroExpander::expandMacros(s, smap),
-             QLatin1String("Title: %n-filename.txt-http://www.kde.org/index.html-Restaurant \"Chew It\"-%"));
+             QLatin1String("Title: %n-filename.txt-https://www.kde.org/index.html-Restaurant \"Chew It\"-%"));
 
     s = "Title: %{file} %{url";
     QCOMPARE(KMacroExpander::expandMacros(s, smap),
@@ -163,13 +163,13 @@
     QHash<QChar, QString> map2;
     map2.insert('a', "%n");
     map2.insert('f', "filename.txt");
-    map2.insert('u', "http://www.kde.org/index.html");
+    map2.insert('u', "https://www.kde.org/index.html");
     map2.insert('n', "Restaurant \"Chew It\"");
 
 #ifdef Q_OS_WIN
     s = "Title: %a - %f - %u - %n - %% - %VARIABLE% foo";
     QCOMPARE(KMacroExpander::expandMacrosShellQuote(s, map2),
-             QLatin1String("Title: %PERCENT_SIGN%n - filename.txt - http://www.kde.org/index.html - \"Restaurant \"\\^\"\"Chew It\"\\^\" - %PERCENT_SIGN% - %VARIABLE% foo"));
+             QLatin1String("Title: %PERCENT_SIGN%n - filename.txt - https://www.kde.org/index.html - \"Restaurant \"\\^\"\"Chew It\"\\^\" - %PERCENT_SIGN% - %VARIABLE% foo"));
 
     s = "kedit --caption %n %f";
     map2.insert('n', "Restaurant 'Chew It'");
@@ -206,7 +206,7 @@
 #else
     s = "Title: %a - %f - %u - %n - %%";
     QCOMPARE(KMacroExpander::expandMacrosShellQuote(s, map2),
-             QLatin1String("Title: %n - filename.txt - http://www.kde.org/index.html - 'Restaurant \"Chew It\"' - %"));
+             QLatin1String("Title: %n - filename.txt - https://www.kde.org/index.html - 'Restaurant \"Chew It\"' - %"));
 
     s = "kedit --caption %n %f";
     map2.insert('n', "Restaurant 'Chew It'");
diff --git a/autotests/kpluginmetadatatest.cpp b/autotests/kpluginmetadatatest.cpp
--- a/autotests/kpluginmetadatatest.cpp
+++ b/autotests/kpluginmetadatatest.cpp
@@ -122,7 +122,7 @@
                 " \"Copyright\": \"(c) Alex Richardson 2015\",\n"
                 " \"Id\": \"time\",\n"
                 " \"Version\": \"1.0\",\n"
-                " \"Website\": \"http://plasma.kde.org/\",\n"
+                " \"Website\": \"https://plasma.kde.org/\",\n"
                 " \"MimeTypes\": [ \"image/png\" ],\n"
                 " \"ServiceTypes\": [\"Plasma/DataEngine\"]\n"
             " }\n}\n", &e).object();
@@ -149,7 +149,7 @@
         QCOMPARE(m.license(), QStringLiteral("LGPL"));
         QCOMPARE(m.copyrightText(), QStringLiteral("(c) Alex Richardson 2015"));
         QCOMPARE(m.version(), QStringLiteral("1.0"));
-        QCOMPARE(m.website(), QStringLiteral("http://plasma.kde.org/"));
+        QCOMPARE(m.website(), QStringLiteral("https://plasma.kde.org/"));
         QCOMPARE(m.serviceTypes(), QStringList() << QStringLiteral("Plasma/DataEngine"));
         QCOMPARE(m.mimeTypes(), QStringList() << QStringLiteral("image/png"));
     }
@@ -235,7 +235,7 @@
         QCOMPARE(md.metaDataFileName(), dfile);
         QCOMPARE(md.iconName(), QStringLiteral("preferences-system-time"));
         QCOMPARE(md.license(), QStringLiteral("LGPL"));
-        QCOMPARE(md.website(), QStringLiteral("http://kde.org/"));
+        QCOMPARE(md.website(), QStringLiteral("https://kde.org/"));
         QCOMPARE(md.category(), QStringLiteral("Examples"));
         QCOMPARE(md.version(), QStringLiteral("1.0"));
         QCOMPARE(md.dependencies(), QStringList());
diff --git a/autotests/kstringhandlertest.cpp b/autotests/kstringhandlertest.cpp
--- a/autotests/kstringhandlertest.cpp
+++ b/autotests/kstringhandlertest.cpp
@@ -17,9 +17,9 @@
 
 void KStringHandlerTest::tagURLs()
 {
-    QString test = "Click on http://foo@bar:www.kde.org/yoyo/dyne.html#a1 for info.";
+    QString test = "Click on https://foo@bar:www.kde.org/yoyo/dyne.html#a1 for info.";
     QCOMPARE(KStringHandler::tagUrls(test),
-             QString("Click on <a href=\"http://foo@bar:www.kde.org/yoyo/dyne.html#a1\">http://foo@bar:www.kde.org/yoyo/dyne.html#a1</a> for info."));
+             QString("Click on <a href=\"https://foo@bar:www.kde.org/yoyo/dyne.html#a1\">https://foo@bar:www.kde.org/yoyo/dyne.html#a1</a> for info."));
 
     test = "http://www.foo.org/story$806";
     QCOMPARE(KStringHandler::tagUrls(test),
diff --git a/autotests/ktexttohtmltest.cpp b/autotests/ktexttohtmltest.cpp
--- a/autotests/ktexttohtmltest.cpp
+++ b/autotests/ktexttohtmltest.cpp
@@ -240,7 +240,7 @@
     }
 
     // test max url length
-    QString url = QStringLiteral("http://www.kde.org/this/is/a_very_loooooong_url/test/test/test");
+    QString url = QStringLiteral("https://www.kde.org/this/is/a_very_loooooong_url/test/test/test");
     {
         KTextToHTMLHelper ll(url, 0, 10);
         QVERIFY(ll.getUrl().isEmpty());    // url too long
@@ -372,20 +372,20 @@
                                  "www.example.com/test.cpp</a>.";
 
     // Bug 313719 - URL in parenthesis
-    QTest::newRow("url-in-parenthesis-1") << "KDE (website http://www.kde.org)"
+    QTest::newRow("url-in-parenthesis-1") << "KDE (website https://www.kde.org)"
                                           << KTextToHTML::Options(KTextToHTML::PreserveSpaces)
-                                          << "KDE (website <a href=\"http://www.kde.org\">http://www.kde.org</a>)";
-    QTest::newRow("url-in-parenthesis-2") << "KDE website (http://www.kde.org)"
+                                          << "KDE (website <a href=\"https://www.kde.org\">https://www.kde.org</a>)";
+    QTest::newRow("url-in-parenthesis-2") << "KDE website (https://www.kde.org)"
                                           << KTextToHTML::Options(KTextToHTML::PreserveSpaces)
-                                          << "KDE website (<a href=\"http://www.kde.org\">http://www.kde.org</a>)";
-    QTest::newRow("url-in-parenthesis-3") << "bla (http://www.kde.org - section 5.2)"
+                                          << "KDE website (<a href=\"https://www.kde.org\">https://www.kde.org</a>)";
+    QTest::newRow("url-in-parenthesis-3") << "bla (https://www.kde.org - section 5.2)"
                                           << KTextToHTML::Options(KTextToHTML::PreserveSpaces)
-                                          << "bla (<a href=\"http://www.kde.org\">http://www.kde.org</a> - section 5.2)";
+                                          << "bla (<a href=\"https://www.kde.org\">https://www.kde.org</a> - section 5.2)";
     
    // Fix url as foo <<url> <url>> when we concatened them.
-   QTest::newRow("url-with-url") << "foo <http://www.kde.org/ <http://www.kde.org/>>"
+   QTest::newRow("url-with-url") << "foo <https://www.kde.org/ <https://www.kde.org/>>"
                                << KTextToHTML::Options(KTextToHTML::PreserveSpaces)
-                               << "foo &lt;<a href=\"http://www.kde.org/ \">http://www.kde.org/ </a>&lt;<a href=\"http://www.kde.org/\">http://www.kde.org/</a>&gt;&gt;";
+                               << "foo &lt;<a href=\"https://www.kde.org/ \">https://www.kde.org/ </a>&lt;<a href=\"https://www.kde.org/\">https://www.kde.org/</a>&gt;&gt;";
 
    //Fix url exploit
    QTest::newRow("url-exec-html") << "https://\"><!--"
diff --git a/autotests/kurlmimedatatest.cpp b/autotests/kurlmimedatatest.cpp
--- a/autotests/kurlmimedatatest.cpp
+++ b/autotests/kurlmimedatatest.cpp
@@ -30,7 +30,7 @@
     QVERIFY(!mimeData->hasUrls());
 
     QList<QUrl> urls;
-    urls.append(QUrl(QLatin1String("http://www.kde.org")));
+    urls.append(QUrl(QLatin1String("https://www.kde.org")));
     urls.append(QUrl(QLatin1String("http://wstephenson:secret@example.com/path")));
     urls.append(QUrl(QLatin1String("file:///home/dfaure/konqtests/Mat%C3%A9riel")));
     QMap<QString, QString> metaData;
@@ -85,7 +85,7 @@
 void KUrlMimeDataTest::testFromQUrl()
 {
     QList<QUrl> qurls;
-    qurls.append(QUrl(QLatin1String("http://www.kde.org")));
+    qurls.append(QUrl(QLatin1String("https://www.kde.org")));
     qurls.append(QUrl(QLatin1String("file:///home/dfaure/konqtests/Mat%C3%A9riel")));
     QMimeData *mimeData = new QMimeData();
     KUrlMimeData::setUrls(QList<QUrl>(), qurls, mimeData);
diff --git a/src/lib/kaboutdata.cpp b/src/lib/kaboutdata.cpp
--- a/src/lib/kaboutdata.cpp
+++ b/src/lib/kaboutdata.cpp
@@ -920,7 +920,7 @@
                "<p>KDE is translated into many languages thanks to the work "
                "of the translation teams all over the world.</p>"
                "<p>For more information on KDE internationalization "
-               "visit <a href=\"http://l10n.kde.org\">http://l10n.kde.org</a></p>",
+               "visit <a href=\"https://l10n.kde.org\">https://l10n.kde.org</a></p>",
                "replace this with information about your translation team"
            );
 }
@@ -1168,7 +1168,7 @@
         }
         if (!customAuthorTextEnabled()) {
             if (bugAddress() == QLatin1String("submit@bugs.kde.org") ) {
-                printf("%s\n", qPrintable(QCoreApplication::translate("KAboutData CLI", "Please use http://bugs.kde.org to report bugs.")));
+                printf("%s\n", qPrintable(QCoreApplication::translate("KAboutData CLI", "Please use https://bugs.kde.org to report bugs.")));
             } else if (!bugAddress().isEmpty()) {
                 printf("%s\n", qPrintable(QCoreApplication::translate("KAboutData CLI", "Please report bugs to %1.").arg(bugAddress())));
             }
diff --git a/src/lib/plugin/kpluginmetadata.h b/src/lib/plugin/kpluginmetadata.h
--- a/src/lib/plugin/kpluginmetadata.h
+++ b/src/lib/plugin/kpluginmetadata.h
@@ -86,7 +86,7 @@
         "License": "LGPL",
         "Id": "time",
         "Version": "1.0",
-        "Website": "http://plasma.kde.org/",
+        "Website": "https://plasma.kde.org/",
         "ServiceTypes": ["Plasma/DataEngine"]
      }
    }