diff --git a/u01/CMakeLists.txt b/u01/CMakeLists.txt
index 86abdf9..ce35d11 100644
--- a/u01/CMakeLists.txt
+++ b/u01/CMakeLists.txt
@@ -2,6 +2,11 @@
 cmake_minimum_required(VERSION 3.20)
 project(ecg_tree)
 
+set(CMAKE_CXX_STANDARD 17)
+# Disable compiler specific extensions
+# On GNU this has the effect of passing -std=c++11 instead of -std=gnu++11
+set(CMAKE_CXX_EXTENSIONS no)
+
 add_library(tree node.cpp)
 add_executable(main main.cpp)
 target_link_libraries(main tree)