diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab418ee..699b1a3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.21)
+cmake_minimum_required(VERSION 3.0)
 project(MissingNumbers)
 
 set(CMAKE_CXX_STANDARD 14)