diff --git a/korganizer/plugins/picoftheday/picoftheday.cpp b/korganizer/plugins/picoftheday/picoftheday.cpp
--- a/korganizer/plugins/picoftheday/picoftheday.cpp
+++ b/korganizer/plugins/picoftheday/picoftheday.cpp
@@ -90,7 +90,7 @@
 {
     // Start downloading the picture
     if (!mFirstStepCompleted && !mFirstStepJob) {
-        QUrl url = QUrl(QStringLiteral("http://en.wikipedia.org/w/index.php?title=Template:POTD/")
+        QUrl url = QUrl(QStringLiteral("https://en.wikipedia.org/w/index.php?title=Template:POTD/")
                         +mDate.toString(Qt::ISODate) + QStringLiteral("&action=raw"));
         // The file at that URL contains the file name for the POTD
 
@@ -157,7 +157,7 @@
 void POTDElement::step2GetImagePage()
 {
     if (!mSecondStepCompleted && !mSecondStepJob) {
-        mUrl = QUrl(QStringLiteral("http://en.wikipedia.org/wiki/File:") + mFileName);
+        mUrl = QUrl(QStringLiteral("https://en.wikipedia.org/wiki/File:") + mFileName);
         // We'll find the info to get the thumbnail we want on the POTD's image page
 
         Q_EMIT gotNewUrl(mUrl);
@@ -249,7 +249,7 @@
         thumbUrl.replace(QRegExp(QLatin1String("//upload.wikimedia.org/wikipedia/commons/(.*)/([^/]*)")),
                          QStringLiteral("//upload.wikimedia.org/wikipedia/commons/thumb/\\1/\\2"));
     }
-    thumbUrl.replace(QRegExp(QLatin1String("^file:////")), QStringLiteral("http://"));
+    thumbUrl.replace(QRegExp(QLatin1String("^file:////")), QStringLiteral("https://"));
     return QUrl(thumbUrl);
 }
 
diff --git a/korganizer/plugins/thisdayinhistory/thisdayinhistory.cpp b/korganizer/plugins/thisdayinhistory/thisdayinhistory.cpp
--- a/korganizer/plugins/thisdayinhistory/thisdayinhistory.cpp
+++ b/korganizer/plugins/thisdayinhistory/thisdayinhistory.cpp
@@ -45,7 +45,7 @@
         = new StoredElement(QStringLiteral("Wikipedia link"), i18n("This day in history"));
 
     element->setUrl(
-        QUrl(i18nc("Localized Wikipedia website", "http://en.wikipedia.org/wiki/")
+        QUrl(i18nc("Localized Wikipedia website", "https://en.wikipedia.org/wiki/")
              +date.toString(i18nc("Qt date format used by the localized Wikipedia",
                                   "MMMM_d"))));
 
@@ -62,7 +62,7 @@
         = new StoredElement(QStringLiteral("Wikipedia link"), i18n("This month in history"));
 
     element->setUrl(
-        QUrl(i18nc("Localized Wikipedia website", "http://en.wikipedia.org/wiki/")
+        QUrl(i18nc("Localized Wikipedia website", "https://en.wikipedia.org/wiki/")
              +date.toString(i18nc("Qt date format used by the localized Wikipedia",
                                   "MMMM_yyyy"))));