diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,8 +24,7 @@
 set(REQUIRED_QT_VERSION 5.5.0)
 find_package(Qt5 ${REQUIRED_QT_VERSION} CONFIG REQUIRED Widgets DBus X11Extras)
 
-set(KF5_VERSION "5.18.0") # handled by release scripts
-set(KF5_DEP_VERSION "5.17.0") # handled by release scripts
+set(KF5_DEP_VERSION "5.33.0")
 
 find_package(KF5Config ${KF5_DEP_VERSION} REQUIRED)
 find_package(KF5ConfigWidgets ${KF5_DEP_VERSION} REQUIRED)
diff --git a/src/platformtheme/kdeplatformfiledialoghelper.cpp b/src/platformtheme/kdeplatformfiledialoghelper.cpp
--- a/src/platformtheme/kdeplatformfiledialoghelper.cpp
+++ b/src/platformtheme/kdeplatformfiledialoghelper.cpp
@@ -127,7 +127,7 @@
 {
     QUrl dirUrl = filename.adjusted(QUrl::RemoveFilename);
     m_fileWidget->setUrl(dirUrl);
-    m_fileWidget->setSelection(filename.toString());
+    m_fileWidget->setSelectedUrl(filename);
 }
 
 void KDEPlatformFileDialog::setViewMode(QFileDialogOptions::ViewMode view)
@@ -224,7 +224,7 @@
             if (!entry.isDir()) {
                 // this is probably a file remove the file part
                 m_fileWidget->setUrl(directory.adjusted(QUrl::RemoveFilename));
-                m_fileWidget->setSelection(directory.fileName());
+                m_fileWidget->setSelectedUrl(directory);
             }
             else {
                 m_fileWidget->setUrl(directory);