diff --git a/CMakeLists.txt b/CMakeLists.txt
index 45027fb..50a8486 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,6 +2,7 @@ cmake_minimum_required(VERSION 3.4)
 project(sente)
 
 set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 if (NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE Release)
diff --git a/pybind11 b/pybind11
index 7516811..2cd32e5 160000
--- a/pybind11
+++ b/pybind11
@@ -1 +1 @@
-Subproject commit 7516811315c76321e847cf28955937195c577d2f
+Subproject commit 2cd32e5d545ef29efa3eb96e1388ff994c743e2d