diff --git a/src/rl_sar/CMakeLists.txt b/src/rl_sar/CMakeLists.txt
index 8a4971a..adccb76 100644
--- a/src/rl_sar/CMakeLists.txt
+++ b/src/rl_sar/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.5)
 project(rl_sar)
 
 add_definitions(-DCMAKE_CURRENT_SOURCE_DIR="${CMAKE_CURRENT_SOURCE_DIR}")