diff --git a/HarmonyLinkLib/CMakeLists.txt b/HarmonyLinkLib/CMakeLists.txt
index c36aa39..af70787 100644
--- a/HarmonyLinkLib/CMakeLists.txt
+++ b/HarmonyLinkLib/CMakeLists.txt
@@ -42,7 +42,7 @@ endif()
 configure_file(include/Version.h.in Version.generated.h)
 
 # Specify the C++ standard
-set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # Explicitly list source files
diff --git a/HarmonyLinkTest/CMakeLists.txt b/HarmonyLinkTest/CMakeLists.txt
index 3b4c7d7..5616a24 100644
--- a/HarmonyLinkTest/CMakeLists.txt
+++ b/HarmonyLinkTest/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.10)
 project(HarmonyLinkTest)
 
 # Specify the C++ standard
-set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 # Automatically add all .cpp and .h/.hpp files in the src directory