diff --git a/CMakeLists.txt b/CMakeLists.txt
index ccd37d2..102a9ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,84 +1,84 @@
 project(klickety)
 
 
-cmake_minimum_required (VERSION 2.8.12 FATAL_ERROR)
+cmake_minimum_required (VERSION 3.5 FATAL_ERROR)
 set (QT_MIN_VERSION "5.7.0")
 set (KF5_MIN_VERSION "5.30.0")
 
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED CONFIG)
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${ECM_MODULE_PATH} ${ECM_KDE_MODULE_DIR})
 
 find_package(Qt5 ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Widgets )
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
     CoreAddons
     Config
     Crash
     WidgetsAddons
     I18n
     ConfigWidgets
     XmlGui
     KIO
     DocTools
     DBusAddons
 )
 
 find_package(KF5KDEGames 4.9.0 REQUIRED)
 
 include(FeatureSummary)
 include(ECMAddAppIcon)
 include(ECMInstallIcons)
 include(KDEInstallDirs)
 include(KDECompilerSettings NO_POLICY_SCOPE)
 include(KDECMakeSettings)
 
 add_definitions(-DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS)
 
 
 set(klickety_SRCS
     gamescene.cpp
     gameview.cpp
     main.cpp
     mainwindow.cpp
     piece.cpp
 )
 
 ki18n_wrap_ui(klickety_SRCS bgselectorconfig.ui customgameconfig.ui gameconfig.ui)
 
 kconfig_add_kcfg_files(klickety_SRCS settings.kcfgc)
 
 file(GLOB ICONS_SRCS "${CMAKE_CURRENT_SOURCE_DIR}/pics/*-apps-klickety.png")
 ecm_add_app_icon(klickety_SRCS ICONS ${ICONS_SRCS})
 
 add_executable(klickety ${klickety_SRCS})
 
 target_link_libraries(klickety
     KF5::Crash
     KF5::DBusAddons
     KF5::KIOCore
     KF5::KIOFileWidgets
     KF5::KIONTLM
     KF5::KIOWidgets
     KF5::XmlGui
     KF5KDEGames
 )
 
 install(TARGETS klickety ${KDE_INSTALL_TARGETS_DEFAULT_ARGS})
 install(FILES klickety.kcfg DESTINATION ${KDE_INSTALL_DATADIR}/klickety)
 install(FILES klicketyui.rc DESTINATION ${KDE_INSTALL_KXMLGUI5DIR}/klickety)
 
 install(PROGRAMS org.kde.klickety.desktop DESTINATION ${KDE_INSTALL_APPDIR})
 install(PROGRAMS org.kde.ksame.desktop DESTINATION ${KDE_INSTALL_APPDIR})
 install(FILES org.kde.klickety.appdata.xml DESTINATION ${KDE_INSTALL_METAINFODIR})
 install(FILES org.kde.ksame.appdata.xml DESTINATION ${KDE_INSTALL_METAINFODIR})
 
 if(NOT WIN32)
     install(PROGRAMS klickety-2.0-inherit-ksame-highscore.pl DESTINATION ${KDE_INSTALL_KCONFUPDATEDIR})
     install(FILES klickety.upd DESTINATION ${KDE_INSTALL_KCONFUPDATEDIR})
 endif(NOT WIN32)
 
 add_subdirectory(sounds)
 add_subdirectory(pics)
 add_subdirectory(themes)
 add_subdirectory(doc)
 
 feature_summary(WHAT ALL INCLUDE_QUIET_PACKAGES FATAL_ON_MISSING_REQUIRED_PACKAGES)