https://bugs.gentoo.org/957928
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,3 @@
+cmake_minimum_required( VERSION 2.8.5...4.1 )
 project( tint2 )
-cmake_minimum_required( VERSION 2.8.5 )
 
--- a/src/tint2conf/CMakeLists.txt
+++ b/src/tint2conf/CMakeLists.txt
@@ -1,3 +1,3 @@
+cmake_minimum_required(VERSION 2.6...4.1)
 project(tint2conf)
-cmake_minimum_required(VERSION 2.6)