diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,6 @@
     DBusAddons
     Notifications
     Runner
-    WindowSystem
     Activities
 )
 
diff --git a/host/CMakeLists.txt b/host/CMakeLists.txt
--- a/host/CMakeLists.txt
+++ b/host/CMakeLists.txt
@@ -23,9 +23,6 @@
     Qt5::Widgets
     KF5::I18n
     KF5::KIOCore
-    KF5::Notifications
-    KF5::WindowSystem
-    KF5::Activities
 )
 
 install(TARGETS plasma-browser-integration-host ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})
diff --git a/reminder/CMakeLists.txt b/reminder/CMakeLists.txt
--- a/reminder/CMakeLists.txt
+++ b/reminder/CMakeLists.txt
@@ -12,12 +12,12 @@
     Qt5::DBus
     Qt5::Widgets
     KF5::CoreAddons
-    KF5::DBusAddons
+    KF5::DBusAddons # for KDEDModule
     KF5::I18n
-    KF5::Notifications
+    KF5::Notifications # for KStatusNotifierItem
     KF5::ConfigCore
-    KF5::Activities
-    KF5::KIOWidgets
-    KF5::WindowSystem)
+    KF5::Activities # for KActivities::ResourceInstance
+    KF5::KIOWidgets # for KRun
+)
 
 install(TARGETS browserintegrationreminder  DESTINATION ${KDE_INSTALL_PLUGINDIR}/kf5/kded)
diff --git a/reminder/browserintegrationreminder.cpp b/reminder/browserintegrationreminder.cpp
--- a/reminder/browserintegrationreminder.cpp
+++ b/reminder/browserintegrationreminder.cpp
@@ -38,7 +38,6 @@
 #include <KRun>
 #include <KService>
 #include <KSharedConfig>
-#include <KStartupInfo>
 #include <KStatusNotifierItem>
 
 #include "browserintegrationreminder.h"