diff --git a/CMakeLists.txt b/CMakeLists.txt
index b018594..5faa3c6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,6 +45,8 @@ endif()
 
 add_library(seallib STATIC ${SEALLIB_SOURCES})
 target_include_directories(seallib PUBLIC src/lib)
+target_compile_features(seallib PUBLIC cxx_std_20)
+set_target_properties(seallib PROPERTIES CXX_EXTENSIONS OFF)
 
 # ------------------------------
 # test