diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -56,7 +56,7 @@
                   VARIABLE_PREFIX KSYSGUARD
                   VERSION_HEADER "${CMAKE_CURRENT_BINARY_DIR}/ksysguard_version.h"
                   PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/KF5SysGuardConfigVersion.cmake"
-                  SOVERSION 7
+                  SOVERSION 8
 )
 
 find_package(X11)
diff --git a/ksgrd/CMakeLists.txt b/ksgrd/CMakeLists.txt
--- a/ksgrd/CMakeLists.txt
+++ b/ksgrd/CMakeLists.txt
@@ -26,13 +26,11 @@
 target_link_libraries(ksgrd
     PUBLIC
         Qt5::Core
-        Qt5::Widgets # QWidget in SensorManager.h
         Qt5::Network # QTcpSocket in SensorSocketAgent.h
         KF5::ConfigCore # KConfigGroup in SensorManager.h
     PRIVATE
         KF5::I18n
         KF5::CoreAddons
-        KF5::ConfigWidgets
         KF5::ProcessCore
 )
 
diff --git a/ksgrd/SensorManager.h b/ksgrd/SensorManager.h
--- a/ksgrd/SensorManager.h
+++ b/ksgrd/SensorManager.h
@@ -78,7 +78,7 @@
     bool resynchronize( const QString &hostName );
     void notify( const QString &msg ) const;
 
-    void setBroadcaster( QWidget *wdg );
+    void setBroadcaster( QObject *wdg );
 
     bool sendRequest( const QString &hostName, const QString &request,
                       SensorClient *client, int id = 0 );
@@ -124,7 +124,7 @@
     QStringList mHostList;
     QStringList mCommandList;
 
-    QPointer<QWidget> mBroadcaster;
+    QPointer<QObject> mBroadcaster;
 };
 
 Q_DECL_EXPORT extern SensorManager* SensorMgr;
diff --git a/ksgrd/SensorManager.cpp b/ksgrd/SensorManager.cpp
--- a/ksgrd/SensorManager.cpp
+++ b/ksgrd/SensorManager.cpp
@@ -21,10 +21,9 @@
 
 */
 
-#include <QApplication>
+#include <QCoreApplication>
 #include <QDebug>
 #include <klocalizedstring.h>
-#include <QWidget>
 #include <QEvent>
 #include <kconfiggroup.h>
 #include "ksgrd_debug.h"
@@ -345,7 +344,7 @@
   }
 }
 
-void SensorManager::setBroadcaster( QWidget *wdg )
+void SensorManager::setBroadcaster( QObject *wdg )
 {
   mBroadcaster = wdg;
 }