diff --git a/CMakeLists.txt b/CMakeLists.txt
index a61fe4a..dd84e83 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.13)
 
 if (NOT CMAKE_C_COMPILER)
     if (GCC)