diff --git a/design/plasmoids b/design/plasmoids
--- a/design/plasmoids
+++ b/design/plasmoids
@@ -78,5 +78,5 @@
 
 Installing and Replacing
 ========================
-Plasmoid packages can be installed and removed from the Add Widgets interfaces of various Plasma applications, such as plasma desktop, or directly using the plasmapkg binary. See the output of `plasmapkg --help` for more information on using that utility.
+Plasmoid packages can be installed and removed from the Add Widgets interfaces of various Plasma applications, such as plasma desktop, or directly using the kpackagetool5 binary. See the output of `kpackagetool5 --help` for more information on using that utility.
 
diff --git a/kcms/desktoptheme/kcm.cpp b/kcms/desktoptheme/kcm.cpp
--- a/kcms/desktoptheme/kcm.cpp
+++ b/kcms/desktoptheme/kcm.cpp
@@ -107,9 +107,8 @@
 {
     qCDebug(KCM_DESKTOP_THEME) << "Installing ... " << file;
 
-    QString program = QStringLiteral("plasmapkg2");
-    QStringList arguments;
-    arguments << QStringLiteral("-t") << QStringLiteral("theme") << QStringLiteral("-i") << file.toLocalFile();
+    const QString program = QStringLiteral("kpackagetool5");
+    const QStringList arguments = { QStringLiteral("--type"), QStringLiteral("Plasma/Theme"), QStringLiteral("--install"), file.toLocalFile()};
 
     qCDebug(KCM_DESKTOP_THEME) << program << arguments.join(QStringLiteral(" "));
     QProcess *myProcess = new QProcess(this);
diff --git a/kcms/desktoptheme/plasma-themes.knsrc b/kcms/desktoptheme/plasma-themes.knsrc
--- a/kcms/desktoptheme/plasma-themes.knsrc
+++ b/kcms/desktoptheme/plasma-themes.knsrc
@@ -22,5 +22,5 @@
 ProvidersUrl=http://download.kde.org/ocs/providers.xml
 Categories=Plasma Theme
 StandardResource=tmp
-InstallationCommand=plasmapkg2 -t theme -i %f
-UninstallCommand=plasmapkg2 -t theme -r %f
+InstallationCommand=kpackagetool5 -t Plasma/Theme -i %f
+UninstallCommand=kpackagetool5 -t Plasma/Theme -r %f