diff --git a/CMakeLists.txt b/CMakeLists.txt
index 42706160186df0b262a5d19015cee5319f951abd..bb7c8c932df5f27448448a125166674dd8514cbb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.26)
+cmake_minimum_required(VERSION 3.20)
 project(nbtest VERSION 0.1.0 LANGUAGES C CXX)
 
 find_package(Python 3.10 COMPONENTS Interpreter Development.Module REQUIRED)