diff --git a/src/kontactplugin/korganizer/CMakeLists.txt b/src/kontactplugin/korganizer/CMakeLists.txt
--- a/src/kontactplugin/korganizer/CMakeLists.txt
+++ b/src/kontactplugin/korganizer/CMakeLists.txt
@@ -8,7 +8,7 @@
 
 add_library(kontact_korganizerplugin MODULE ${kontact_korganizerplugin_PART_SRCS})
 
-target_link_libraries(kontact_korganizerplugin KF5::AkonadiCalendar KF5::CalendarUtils KF5::Contacts KF5::CalendarCore KF5::Libkdepim KF5::KontactInterface korganizerprivate KF5::CalendarSupport KF5::AkonadiCalendar KF5::WindowSystem KF5::I18n KF5::IconThemes)
+target_link_libraries(kontact_korganizerplugin KF5::AkonadiCalendar KF5::CalendarUtils KF5::Contacts KF5::CalendarCore KF5::Libkdepim KF5::KontactInterface korganizerprivate KF5::CalendarSupport KF5::AkonadiCalendar KF5::WindowSystem KF5::I18n)
 
 ########### next target ###############
 
@@ -18,7 +18,7 @@
 
 add_library(kontact_todoplugin MODULE ${kontact_todoplugin_PART_SRCS})
 
-target_link_libraries(kontact_todoplugin KF5::AkonadiCalendar  KF5::Contacts KF5::Libkdepim KF5::KontactInterface KF5::CalendarCore KF5::CalendarUtils KF5::CalendarSupport KF5::AkonadiCalendar KF5::IconThemes KF5::Notifications KF5::WindowSystem)
+target_link_libraries(kontact_todoplugin KF5::AkonadiCalendar  KF5::Contacts KF5::Libkdepim KF5::KontactInterface KF5::CalendarCore KF5::CalendarUtils KF5::CalendarSupport KF5::AkonadiCalendar KF5::WindowSystem)
 
 ########### next target ###############
 
@@ -28,7 +28,7 @@
 
 add_library(kontact_journalplugin MODULE ${kontact_journalplugin_PART_SRCS})
 
-target_link_libraries(kontact_journalplugin  KF5::KontactInterface KF5::IconThemes KF5::WindowSystem)
+target_link_libraries(kontact_journalplugin  KF5::KontactInterface KF5::WindowSystem)
 
 ########### next target ###############
 
diff --git a/src/kontactplugin/korganizer/apptsummarywidget.cpp b/src/kontactplugin/korganizer/apptsummarywidget.cpp
--- a/src/kontactplugin/korganizer/apptsummarywidget.cpp
+++ b/src/kontactplugin/korganizer/apptsummarywidget.cpp
@@ -42,15 +42,15 @@
 
 #include <KConfigGroup>
 #include <KColorScheme>
-#include <KIconLoader>
 #include <KLocalizedString>
 #include <QMenu>
 #include <KUrlLabel>
 #include <KConfig>
 
 #include <QGridLayout>
 #include <QLabel>
 #include <QVBoxLayout>
+#include <QStyle>
 
 ApptSummaryWidget::ApptSummaryWidget(KOrganizerPlugin *plugin, QWidget *parent)
     : KontactInterface::Summary(parent)
@@ -123,11 +123,9 @@
     QLabel *label = nullptr;
     int counter = 0;
 
-    KIconLoader loader(QStringLiteral("korganizer"));
-    QPixmap pm = loader.loadIcon(QStringLiteral("view-calendar-day"), KIconLoader::Small);
-    QPixmap pmb = loader.loadIcon(QStringLiteral("view-calendar-birthday"), KIconLoader::Small);
-    QPixmap pma = loader.loadIcon(QStringLiteral(
-                                      "view-calendar-wedding-anniversary"), KIconLoader::Small);
+    QPixmap pm = QIcon::fromTheme(QStringLiteral("view-calendar-day")).pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize));
+    QPixmap pmb = QIcon::fromTheme(QStringLiteral("view-calendar-birthday")).pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize));
+    QPixmap pma = QIcon::fromTheme(QStringLiteral("view-calendar-wedding-anniversary")).pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize));
 
     QStringList uidList;
     SummaryEventInfo::setShowSpecialEvents(mShowBirthdaysFromCal,
@@ -275,8 +273,7 @@
     QAction *editIt = popup.addAction(i18n("&Edit Appointment..."));
 
     QAction *delIt = popup.addAction(i18n("&Delete Appointment"));
-    delIt->setIcon(KIconLoader::global()->
-                   loadIcon(QStringLiteral("edit-delete"), KIconLoader::Small));
+    delIt->setIcon(QIcon::fromTheme(QStringLiteral("edit-delete")));
 
     Akonadi::Item item = mCalendar->item(uid);
     delIt->setEnabled(mCalendar->hasRight(item, Akonadi::Collection::CanDeleteItem));
diff --git a/src/kontactplugin/korganizer/journalplugin.cpp b/src/kontactplugin/korganizer/journalplugin.cpp
--- a/src/kontactplugin/korganizer/journalplugin.cpp
+++ b/src/kontactplugin/korganizer/journalplugin.cpp
@@ -29,7 +29,6 @@
 #include <KontactInterface/Core>
 
 #include <KActionCollection>
-#include <KIconLoader>
 #include <KLocalizedString>
 #include "korganizerplugin_debug.h"
 #include <QAction>
@@ -43,8 +42,6 @@
 {
     setComponentName(QStringLiteral("korganizer"), i18n("KOrganizer"));
 
-    KIconLoader::global()->addAppDir(QStringLiteral("korganizer"));
-
     QAction *action
         = new QAction(QIcon::fromTheme(QStringLiteral("journal-new")),
                       i18nc("@action:inmenu", "New Journal..."), this);
diff --git a/src/kontactplugin/korganizer/korganizerplugin.cpp b/src/kontactplugin/korganizer/korganizerplugin.cpp
--- a/src/kontactplugin/korganizer/korganizerplugin.cpp
+++ b/src/kontactplugin/korganizer/korganizerplugin.cpp
@@ -42,7 +42,6 @@
 #include <KActionCollection>
 #include "korganizerplugin_debug.h"
 #include <QIcon>
-#include <KIconLoader>
 #include <KLocalizedString>
 #include <KMessageBox>
 #include <QTemporaryFile>
@@ -57,7 +56,6 @@
     , mIface(nullptr)
 {
     setComponentName(QStringLiteral("korganizer"), i18n("KOrganizer"));
-    KIconLoader::global()->addAppDir(QStringLiteral("korganizer"));
 
     QAction *action
         = new QAction(QIcon::fromTheme(QStringLiteral("appointment-new")),
diff --git a/src/kontactplugin/korganizer/todoplugin.cpp b/src/kontactplugin/korganizer/todoplugin.cpp
--- a/src/kontactplugin/korganizer/todoplugin.cpp
+++ b/src/kontactplugin/korganizer/todoplugin.cpp
@@ -41,7 +41,6 @@
 #include <KActionCollection>
 #include "korganizerplugin_debug.h"
 #include <QIcon>
-#include <KIconLoader>
 #include <KLocalizedString>
 #include <KMessageBox>
 #include <QTemporaryFile>
@@ -55,7 +54,6 @@
     , mIface(nullptr)
 {
     setComponentName(QStringLiteral("korganizer"), i18n("KOrganizer"));
-    KIconLoader::global()->addAppDir(QStringLiteral("korganizer"));
 
     QAction *action
         = new QAction(QIcon::fromTheme(QStringLiteral("task-new")),
diff --git a/src/kontactplugin/korganizer/todosummarywidget.cpp b/src/kontactplugin/korganizer/todosummarywidget.cpp
--- a/src/kontactplugin/korganizer/todosummarywidget.cpp
+++ b/src/kontactplugin/korganizer/todosummarywidget.cpp
@@ -40,15 +40,15 @@
 
 #include <KConfig>
 #include <KConfigGroup>
-#include <KIconLoader>
 #include <KLocalizedString>
 #include <QMenu>
 #include <KUrlLabel>
 
 #include <QGridLayout>
 #include <QLabel>
 #include <QTextDocument>  // for Qt::mightBeRichText
 #include <QVBoxLayout>
+#include <QStyle>
 
 using namespace KCalUtils;
 
@@ -177,8 +177,7 @@
     QLabel *label = nullptr;
 
     if (!prList.isEmpty()) {
-        KIconLoader loader(QStringLiteral("korganizer"));
-        QPixmap pm = loader.loadIcon(QStringLiteral("view-calendar-tasks"), KIconLoader::Small);
+        QPixmap pm = QIcon::fromTheme(QStringLiteral("view-calendar-tasks")).pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize));
 
         QString str;
 
@@ -358,16 +357,14 @@
     QMenu popup(this);
     QAction *editIt = popup.addAction(i18n("&Edit To-do..."));
     QAction *delIt = popup.addAction(i18n("&Delete To-do"));
-    delIt->setIcon(KIconLoader::global()->loadIcon(QStringLiteral(
-                                                       "edit-delete"), KIconLoader::Small));
+    delIt->setIcon(QIcon::fromTheme(QStringLiteral("edit-delete")));
 
     QAction *doneIt = nullptr;
     delIt->setEnabled(mCalendar->hasRight(item, Akonadi::Collection::CanDeleteItem));
 
     if (!todo->isCompleted()) {
         doneIt = popup.addAction(i18n("&Mark To-do Completed"));
-        doneIt->setIcon(KIconLoader::global()->loadIcon(QStringLiteral("task-complete"),
-                                                        KIconLoader::Small));
+        doneIt->setIcon(QIcon::fromTheme(QStringLiteral("task-complete")));
         doneIt->setEnabled(mCalendar->hasRight(item, Akonadi::Collection::CanChangeItem));
     }
     // TODO: add icons to the menu actions
diff --git a/src/kontactplugin/specialdates/CMakeLists.txt b/src/kontactplugin/specialdates/CMakeLists.txt
--- a/src/kontactplugin/specialdates/CMakeLists.txt
+++ b/src/kontactplugin/specialdates/CMakeLists.txt
@@ -18,7 +18,6 @@
   KF5::AkonadiCore
   KF5::AkonadiContact
   KF5::CalendarSupport
-  KF5::IconThemes
 )
 
 ########### next target ###############
diff --git a/src/kontactplugin/specialdates/sdsummarywidget.cpp b/src/kontactplugin/specialdates/sdsummarywidget.cpp
--- a/src/kontactplugin/specialdates/sdsummarywidget.cpp
+++ b/src/kontactplugin/specialdates/sdsummarywidget.cpp
@@ -42,7 +42,6 @@
 #include <QMenu>
 #include <KLocalizedString>
 #include <KUrlLabel>
-#include <KIconLoader>
 #include <KConfigGroup>
 #include <KConfig>
 #include <QDesktopServices>
@@ -52,6 +51,7 @@
 #include <QEvent>
 #include <QLabel>
 #include <QGridLayout>
+#include <QStyle>
 
 using namespace KHolidays;
 
@@ -463,7 +463,7 @@
             }
             label = new QLabel(this);
             if (icon_img.isNull()) {
-                label->setPixmap(KIconLoader::global()->loadIcon(icon_name, KIconLoader::Small));
+                label->setPixmap(QIcon::fromTheme(icon_name).pixmap(style()->pixelMetric(QStyle::PM_SmallIconSize)));
             } else {
                 label->setPixmap(QPixmap::fromImage(icon_img));
             }
@@ -691,13 +691,9 @@
 {
     QMenu popup(this);
     const QAction *sendMailAction
-        = popup.addAction(KIconLoader::global()->loadIcon(QStringLiteral("mail-message-new"),
-                                                          KIconLoader::Small),
-                          i18n("Send &Mail"));
+        = popup.addAction(QIcon::fromTheme(QStringLiteral("mail-message-new")), i18n("Send &Mail"));
     const QAction *viewContactAction
-        = popup.addAction(KIconLoader::global()->loadIcon(QStringLiteral("view-pim-contacts"),
-                                                          KIconLoader::Small),
-                          i18n("View &Contact"));
+        = popup.addAction(QIcon::fromTheme(QStringLiteral("view-pim-contacts")), i18n("View &Contact"));
 
     const QAction *ret = popup.exec(QCursor::pos());
     if (ret == sendMailAction) {
diff --git a/src/widgets/navigatorbar.cpp b/src/widgets/navigatorbar.cpp
--- a/src/widgets/navigatorbar.cpp
+++ b/src/widgets/navigatorbar.cpp
@@ -25,7 +25,6 @@
 #include "navigatorbar.h"
 #include "koglobals.h"
 
-#include <KIconLoader>
 #include <KLocalizedString>
 
 #include <QHBoxLayout>
@@ -221,9 +220,7 @@
 {
     QToolButton *button = new QToolButton(this);
 
-    button->setIcon(
-        KIconLoader::global()->loadIcon(icon, KIconLoader::Desktop, KIconLoader::SizeSmall));
-    button->setIconSize(QSize(KIconLoader::SizeSmall, KIconLoader::SizeSmall));
+    button->setIcon(QIcon::fromTheme(icon));
     button->setToolButtonStyle(Qt::ToolButtonIconOnly);
     button->setAutoRaise(true);
     button->setToolTip(toolTip);