Index: mono/btls/CMakeLists.txt
--- mono/btls/CMakeLists.txt.orig
+++ mono/btls/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 2.8.10...4.0)
+cmake_minimum_required(VERSION 2.8.12...3.20)
 
 project (mono-btls)
 
