diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,7 +30,7 @@
 set(CALENDARUTILS_LIB_VERSION "5.11.40")
 set(AKONADI_LIB_VERSION "5.11.40")
 set(QT_REQUIRED_VERSION "5.10.0")
-set(KCALENDARCORE_LIB_VERSION "5.11.42")
+set(KCALENDARCORE_LIB_VERSION "5.11.44")
 set(AKONADICALENDAR_LIB_VERSION "5.11.40")
 set(KMIME_LIB_VERSION "5.11.40")
 set(LIBKDEPIM_LIB_VERSION "5.11.40")
diff --git a/src/agenda/agendaitem.cpp b/src/agenda/agendaitem.cpp
--- a/src/agenda/agendaitem.cpp
+++ b/src/agenda/agendaitem.cpp
@@ -144,16 +144,15 @@
             mIconGroupTent = false;
             mIconOrganizer = true;
         } else {
-            KCalCore::Attendee::Ptr me
-                = mIncidence->attendeeByMails(mEventView->kcalPreferences()->allEmails());
+            KCalCore::Attendee me = mIncidence->attendeeByMails(mEventView->kcalPreferences()->allEmails());
 
-            if (me) {
-                if (me->status() == KCalCore::Attendee::NeedsAction && me->RSVP()) {
+            if (!me.isNull()) {
+                if (me.status() == KCalCore::Attendee::NeedsAction && me.RSVP()) {
                     mIconReply = true;
                     mIconGroup = false;
                     mIconGroupTent = false;
                     mIconOrganizer = false;
-                } else if (me->status() == KCalCore::Attendee::Tentative) {
+                } else if (me.status() == KCalCore::Attendee::Tentative) {
                     mIconReply = false;
                     mIconGroup = false;
                     mIconGroupTent = true;
@@ -643,7 +642,7 @@
     QString name, email;
     KEmailAddress::extractEmailAddressAndName(newAttendee, email, name);
     if (!(name.isEmpty() && email.isEmpty())) {
-        mIncidence->addAttendee(KCalCore::Attendee::Ptr(new KCalCore::Attendee(name, email)));
+        mIncidence->addAttendee(KCalCore::Attendee(name, email));
         KMessageBox::information(
             this,
             i18n("Attendee \"%1\" added to the calendar item \"%2\"",
diff --git a/src/eventview.cpp b/src/eventview.cpp
--- a/src/eventview.cpp
+++ b/src/eventview.cpp
@@ -634,7 +634,7 @@
     KCalCore::Attendee::List attendees = ev->attendees();
     KCalCore::Attendee::List::ConstIterator it;
     for (it = attendees.constBegin(); it != attendees.constEnd(); ++it) {
-        if (kcalPreferences()->thatIsMe((*it)->email())) {
+        if (kcalPreferences()->thatIsMe((*it).email())) {
             return true;
         }
     }
diff --git a/src/todo/todomodel.cpp b/src/todo/todomodel.cpp
--- a/src/todo/todomodel.cpp
+++ b/src/todo/todomodel.cpp
@@ -780,8 +780,7 @@
                         QString name, email, comment;
                         if (KEmailAddress::splitAddress(*it, name, email, comment)
                             == KEmailAddress::AddressOk) {
-                            destTodo->addAttendee(
-                                KCalCore::Attendee::Ptr(new KCalCore::Attendee(name, email)));
+                            destTodo->addAttendee(KCalCore::Attendee(name, email));
                         }
                     }
                 }
diff --git a/src/whatsnext/whatsnextview.cpp b/src/whatsnext/whatsnextview.cpp
--- a/src/whatsnext/whatsnextview.cpp
+++ b/src/whatsnext/whatsnextview.cpp
@@ -192,9 +192,9 @@
     events = calendar()->events(QDate::currentDate(), QDate(2975, 12, 6),
                                 QTimeZone::systemTimeZone());
     for (const KCalCore::Event::Ptr &ev : qAsConst(events)) {
-        KCalCore::Attendee::Ptr me = ev->attendeeByMails(myEmails);
-        if (me != nullptr) {
-            if (me->status() == KCalCore::Attendee::NeedsAction && me->RSVP()) {
+        KCalCore::Attendee me = ev->attendeeByMails(myEmails);
+        if (!me.isNull()) {
+            if (me.status() == KCalCore::Attendee::NeedsAction && me.RSVP()) {
                 if (replies == 0) {
                     mText += QLatin1String("<p></p>");
                     kil->loadIcon(QStringLiteral("mail-reply-sender"), KIconLoader::NoGroup, 22,
@@ -213,9 +213,9 @@
     }
     todos = calendar()->todos();
     for (const KCalCore::Todo::Ptr &to : qAsConst(todos)) {
-        KCalCore::Attendee::Ptr me = to->attendeeByMails(myEmails);
-        if (me != nullptr) {
-            if (me->status() == KCalCore::Attendee::NeedsAction && me->RSVP()) {
+        KCalCore::Attendee me = to->attendeeByMails(myEmails);
+        if (!me.isNull()) {
+            if (me.status() == KCalCore::Attendee::NeedsAction && me.RSVP()) {
                 if (replies == 0) {
                     mText += QLatin1String("<p></p>");
                     kil->loadIcon(QStringLiteral("mail-reply-sender"), KIconLoader::NoGroup, 22,