diff --git a/CliFx.props b/CliFx.props
index 40815c1..07dbc94 100644
--- a/CliFx.props
+++ b/CliFx.props
@@ -6,6 +6,7 @@
     <Copyright>Copyright (C) Alexey Golub</Copyright>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
+    <WarningsAsErrors>nullable</WarningsAsErrors>
   </PropertyGroup>
 
 </Project>
\ No newline at end of file