diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ba357c..0ef404d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,6 +74,7 @@ set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} -UNDEBUG")
 
 # Make sure we get a sane C version
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
+set(CMAKE_CXX_STANDARD 20)
 
 # Enable OpenMP
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fopenmp")