diff --git a/CMakeLists.txt b/CMakeLists.txt
index 834614904f4afb80a8e82a2e40e6d69803d75d64..53a332049b63e2b04d88c02640ff6c80038a6d95 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.23)
+cmake_minimum_required(VERSION 3.20)
 option(BUILD_DOC    "Build documentation"    OFF)
 option(USE_NETCDF "Enable netcdf library for tests output" OFF)
 option(WITH_RRTMG "with(out) RRTMG radiation transfer" OFF)