diff --git a/CMakeLists.txt b/CMakeLists.txt
index 71ad152..64b00ab 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,59 +1,59 @@
 project(kfourinline)
 
-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 Svg)
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS
     Config
     ConfigWidgets
     CoreAddons
     Crash
     DNSSD
     DocTools
     I18n
     WidgetsAddons
     XmlGui
 )
 
 find_package(KF5KDEGames 4.9.0 REQUIRED)
 
 include(FeatureSummary)
 include(ECMInstallIcons)
 include(KDEInstallDirs)
 include(KDEFrameworkCompilerSettings NO_POLICY_SCOPE)
 include(KDECMakeSettings)
 include(ECMAddAppIcon)
 include(ECMQtDeclareLoggingCategory)
 
 
 
 add_subdirectory(src)
 add_subdirectory(grafix)
 add_subdirectory(doc)
 
 
 ########### install files ###############
 
 install(PROGRAMS org.kde.kfourinline.desktop  DESTINATION  ${KDE_INSTALL_APPDIR})
 
 install(FILES org.kde.kfourinline.appdata.xml  DESTINATION  ${KDE_INSTALL_METAINFODIR})
 
 ecm_install_icons(ICONS
     128-apps-kfourinline.png
     16-apps-kfourinline.png
     22-apps-kfourinline.png
     32-apps-kfourinline.png
     48-apps-kfourinline.png
     64-apps-kfourinline.png
     DESTINATION ${KDE_INSTALL_ICONDIR}
 )
 
 install( FILES kfourinline.categories DESTINATION ${KDE_INSTALL_CONFDIR} )
 
 feature_summary(WHAT ALL INCLUDE_QUIET_PACKAGES FATAL_ON_MISSING_REQUIRED_PACKAGES)