https://src.fedoraproject.org/rpms/lib3mf/pull-request/6

Index: Documentation/source/Cpp/CMakeLists_implicit.txt
--- Documentation/source/Cpp/CMakeLists_implicit.txt.orig
+++ Documentation/source/Cpp/CMakeLists_implicit.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.5...4.0)
 
 set(CMAKE_CURRENT_BINDING_DIR ${CMAKE_CURRENT_SOURCE_DIR}/.)
 project(Lib3MFExample_CPPImplicit)
