diff --git a/cmake/SIOBuild.cmake b/cmake/SIOBuild.cmake
index b7ea4f80..06a12cfb 100644
--- a/cmake/SIOBuild.cmake
+++ b/cmake/SIOBuild.cmake
@@ -197,7 +197,7 @@ ELSE()
 ENDIF()
 
 # Dealing with CXX standard
-SET( SIO_POSSIBLE_CXX_STANDARDS 11 14 17 20 )
+SET( SIO_POSSIBLE_CXX_STANDARDS 11 14 17 20 23 )
 LIST( GET SIO_POSSIBLE_CXX_STANDARDS 0 SIO_MINIMUM_CXX_REQUIRED )
 
 IF( CMAKE_CXX_STANDARD )