diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1692e51..e916930 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,90 +1,90 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.5)
 
 set(KF5_VERSION "5.53.0") # handled by release scripts
 project(KDBusAddons VERSION ${KF5_VERSION})
 
 include(FeatureSummary)
 find_package(ECM 5.53.0  NO_MODULE)
 set_package_properties(ECM PROPERTIES TYPE REQUIRED DESCRIPTION "Extra CMake Modules." URL "https://projects.kde.org/projects/kdesupport/extra-cmake-modules")
 feature_summary(WHAT REQUIRED_PACKAGES_NOT_FOUND FATAL_ON_MISSING_REQUIRED_PACKAGES)
 
 
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
 
 include(KDEInstallDirs)
 include(KDEFrameworkCompilerSettings NO_POLICY_SCOPE)
 include(KDECMakeSettings)
 include(ECMQtDeclareLoggingCategory)
 
 set(REQUIRED_QT_VERSION 5.9.0)
 find_package(Qt5DBus ${REQUIRED_QT_VERSION} REQUIRED NO_MODULE)
 find_package(Qt5X11Extras ${REQUIRED_QT_VERSION} NO_MODULE)
 
 
 include(GenerateExportHeader)
 include(CMakePackageConfigHelpers)
 include(ECMSetupVersion)
 include(ECMGenerateHeaders)
 include(ECMMarkNonGuiExecutable)
 include(ECMAddQch)
 
 include(ECMPoQmTools)
 
 ecm_setup_version(PROJECT VARIABLE_PREFIX KDBUSADDONS
                         VERSION_HEADER "${CMAKE_CURRENT_BINARY_DIR}/kdbusaddons_version.h"
                         PACKAGE_VERSION_FILE "${CMAKE_CURRENT_BINARY_DIR}/KF5DBusAddonsConfigVersion.cmake"
                         SOVERSION 5)
 
 if(Qt5X11Extras_FOUND)
     set(qtx11extras Qt5::X11Extras)
     set(HAVE_X11 TRUE)
 else()
     set(HAVE_X11 FALSE)
 endif()
 
 option(BUILD_QCH "Build API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)" OFF)
 add_feature_info(QCH ${BUILD_QCH} "API documentation in QCH format (for e.g. Qt Assistant, Qt Creator & KDevelop)")
 
 if (IS_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/po")
     ecm_install_po_files_as_qm(po)
 endif()
 
 add_subdirectory(src)
 if (BUILD_TESTING)
     add_subdirectory(autotests)
     add_subdirectory(tests)
 endif()
 
 # create a Config.cmake and a ConfigVersion.cmake file and install them
 set(CMAKECONFIG_INSTALL_DIR "${KDE_INSTALL_CMAKEPACKAGEDIR}/KF5DBusAddons")
 
 if (BUILD_QCH)
     ecm_install_qch_export(
         TARGETS KF5DBusAddons_QCH
         FILE KF5DBusAddonsQchTargets.cmake
         DESTINATION "${CMAKECONFIG_INSTALL_DIR}"
         COMPONENT Devel
     )
     set(PACKAGE_INCLUDE_QCHTARGETS "include(\"\${CMAKE_CURRENT_LIST_DIR}/KF5DBusAddonsQchTargets.cmake\")")
 endif()
 
 configure_package_config_file("${CMAKE_CURRENT_SOURCE_DIR}/KF5DBusAddonsConfig.cmake.in"
                               "${CMAKE_CURRENT_BINARY_DIR}/KF5DBusAddonsConfig.cmake"
                               INSTALL_DESTINATION  ${CMAKECONFIG_INSTALL_DIR}
                               )
 
 install(FILES  "${CMAKE_CURRENT_BINARY_DIR}/KF5DBusAddonsConfig.cmake"
                "${CMAKE_CURRENT_BINARY_DIR}/KF5DBusAddonsConfigVersion.cmake"
                "KF5DBusAddonsMacros.cmake"
                "KF5dbus.service.in"
         DESTINATION "${CMAKECONFIG_INSTALL_DIR}"
         COMPONENT Devel )
 
 install(EXPORT KF5DBusAddonsTargets  DESTINATION "${CMAKECONFIG_INSTALL_DIR}"  FILE KF5DBusAddonsTargets.cmake  NAMESPACE KF5:: )
 
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/kdbusaddons_version.h  DESTINATION ${KDE_INSTALL_INCLUDEDIR_KF5}  COMPONENT Devel )
 
 # contains list of debug categories, for kdebugsettings
 install(FILES kdbusaddons.categories DESTINATION ${KDE_INSTALL_CONFDIR})
 
 feature_summary(WHAT ALL FATAL_ON_MISSING_REQUIRED_PACKAGES)