diff --git a/CMakeLists.txt b/CMakeLists.txt
index 620d98bb8..c911d03d1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -41,7 +41,7 @@ include(GenerateBuiltinsList)
 check_python_module_exists(PYTHON_HAVE_MARKUPSAFE markupsafe)
 
 if (NOT CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 17)
+  set(CMAKE_CXX_STANDARD 20)
 endif()
 
 if (NOT CMAKE_C_STANDARD)