diff --git a/Directory.Build.props b/Directory.Build.props
index e103ce41..71398adc 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -7,7 +7,7 @@
     <Copyright>Copyright (c) Oleksii Holub</Copyright>
     <LangVersion>preview</LangVersion>
     <Nullable>enable</Nullable>
-    <WarningsAsErrors>nullable</WarningsAsErrors>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
   </PropertyGroup>
 
 </Project>
\ No newline at end of file