diff --git a/.github/workflows/ZenLib_Checks.yml b/.github/workflows/ZenLib_Checks.yml
index 499b599..b9d6b02 100644
--- a/.github/workflows/ZenLib_Checks.yml
+++ b/.github/workflows/ZenLib_Checks.yml
@@ -62,7 +62,7 @@ jobs:
       matrix:
         include:
           - runner: windows-latest
-            CXXFLAGS: "/std:c++20 /WX /MP"
+            CXXFLAGS: "/WX"
           - runner: ubuntu-latest
             CXXFLAGS: "-Werror"
           - runner: macos-latest
diff --git a/Project/CMake/CMakeLists.txt b/Project/CMake/CMakeLists.txt
index 9068eb8..d4c98c8 100644
--- a/Project/CMake/CMakeLists.txt
+++ b/Project/CMake/CMakeLists.txt
@@ -166,10 +166,11 @@ set_target_properties(zen PROPERTIES
   VERSION ${ZenLib_VERSION}
   SOVERSION ${ZenLib_MAJOR_VERSION}
   PUBLIC_HEADER "${ZenLib_HDRS}"
-  CXX_STANDARD 11
+  CXX_STANDARD 20
   CXX_EXTENSIONS NO
-  CXX_STANDARD_REQUIRED YES
+  CXX_STANDARD_REQUIRED NO
   )
+target_compile_features(zen PRIVATE cxx_std_11)
 
 install(TARGETS zen EXPORT zen-export
   PUBLIC_HEADER DESTINATION ${INCLUDE_INSTALL_DIR}/ZenLib