diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d67399..f99e8cf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,7 +21,7 @@ set(CMAKE_BUILD_TYPE Release)
 
 ######### compiler flags ###########
 set(CMAKE_CXX_EXTENSIONS OFF)
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
     "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")