diff --git a/sample.psenvrc b/sample.psenvrc
index 013fd23..1e05fc6 100755
--- a/sample.psenvrc
+++ b/sample.psenvrc
@@ -21,4 +21,4 @@ foreach {
     }
 }
 
-$Env:CXXFLAGS = "/std:c++17 /EHsc"
\ No newline at end of file
+$Env:CXXFLAGS = "/std:c++17 /EHsc /Ox /Wv:18"
\ No newline at end of file