diff --git a/libnotificationmanager/notifications.cpp b/libnotificationmanager/notifications.cpp
--- a/libnotificationmanager/notifications.cpp
+++ b/libnotificationmanager/notifications.cpp
@@ -20,11 +20,11 @@
 
 #include "notifications.h"
 
+#include <QConcatenateTablesProxyModel>
 #include <QDebug>
 #include <QMetaEnum>
 #include <QSharedPointer>
 
-#include <KConcatenateRowsProxyModel>
 #include <KDescendantsProxyModel>
 
 #include "notificationsmodel.h"
@@ -81,7 +81,7 @@
     JobsModel::Ptr jobsModel;
     QSharedPointer<Settings> settings() const;
 
-    KConcatenateRowsProxyModel *notificationsAndJobsModel = nullptr;
+    QConcatenateTablesProxyModel *notificationsAndJobsModel = nullptr;
 
     NotificationFilterProxyModel *filterModel = nullptr;
     NotificationSortProxyModel *sortModel = nullptr;
@@ -141,7 +141,7 @@
      * NotificationsModel      JobsModel
      *        \\                 /
      *         \\               /
-     *     KConcatenateRowsProxyModel
+     *    QConcatenateTablesProxyModel
      *               |||
      *               |||
      *     NotificationFilterProxyModel
@@ -174,7 +174,7 @@
      */
 
     if (!notificationsAndJobsModel) {
-        notificationsAndJobsModel = new KConcatenateRowsProxyModel(q);
+        notificationsAndJobsModel = new QConcatenateTablesProxyModel(q);
     }
 
     if (!filterModel) {
@@ -358,8 +358,8 @@
                     found = true;
                     break;
                 }
-            } else if (auto *concatenateModel = qobject_cast<KConcatenateRowsProxyModel *>(model)) {
-                // There's no "sourceModels()" on KConcatenateRowsProxyModel
+            } else if (auto *concatenateModel = qobject_cast<QConcatenateTablesProxyModel *>(model)) {
+                // TODO use QConcatenateTablesProxyModel::sourceModels() once we depend on Qt 5.15
                 if (idxModel == notificationsModel.data() || idxModel == jobsModel.data()) {
                     resolvedIdx = concatenateModel->mapFromSource(resolvedIdx);
                     found = true;
diff --git a/libnotificationmanager/utils.cpp b/libnotificationmanager/utils.cpp
--- a/libnotificationmanager/utils.cpp
+++ b/libnotificationmanager/utils.cpp
@@ -23,13 +23,12 @@
 #include <QAbstractItemModel>
 #include <QAbstractProxyModel>
 #include <QCoreApplication>
+#include <QConcatenateTablesProxyModel>
 #include <QDBusConnection>
 #include <QDBusConnectionInterface>
 #include <QFile>
 #include <QTextStream>
 
-#include <KConcatenateRowsProxyModel>
-
 #include <KProcessList>
 
 using namespace NotificationManager;
@@ -79,8 +78,8 @@
     while (resolvedIdx.isValid() && resolvedIdx.model() != sourceModel) {
         if (auto *proxyModel = qobject_cast<const QAbstractProxyModel *>(resolvedIdx.model())) {
             resolvedIdx = proxyModel->mapToSource(resolvedIdx);
-        // KConcatenateRowsProxyModel isn't a "real" proxy model, so we need to special case for it :(
-        } else if (auto *concatenateModel = qobject_cast<const KConcatenateRowsProxyModel *>(resolvedIdx.model())) {
+        // QConcatenateTablesProxyModel isn't a "real" proxy model, so we need to special case for it :(
+        } else if (auto *concatenateModel = qobject_cast<const QConcatenateTablesProxyModel *>(resolvedIdx.model())) {
             resolvedIdx = concatenateModel->mapToSource(resolvedIdx);
         } else {
             if (resolvedIdx.model() != sourceModel) {