diff --git a/CMakeLists.txt b/CMakeLists.txt
index e27486bb..83076439 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,12 +29,6 @@ set(PROJECT_CXX_FLAGS "-fconcepts-diagnostics-depth=2")
 
 add_definitions(${PROJECT_CXX_FLAGS})
 
-if(NOT CMAKE_CXX_STANDARD)
-    set(CMAKE_CXX_STANDARD 20)
-endif()
-
-set(CMAKE_CXX_STANDARD_REQUIRED True)
-
 # always write compile_commands.json
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE INTERNAL "")