diff --git a/CMakeLists.txt b/CMakeLists.txt
index abc0d0d..bb5690d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -81,7 +81,7 @@ endif()
 # dependencies
 
 set(CMAKE_C_STANDARD   11)
-set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD 11)
 
 find_package(Threads REQUIRED)