diff --git a/Directory.Build.props b/Directory.Build.props
index 2c3ecd9..7ac238e 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,7 +1,10 @@
 <Project>
 
   <PropertyGroup>
-    <LangVersion>latest</LangVersion>
+    <LangVersion>9.0</LangVersion>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <TreatSpecificWarningsAsErrors />
+    <CheckEolTargetFramework>false</CheckEolTargetFramework>
   </PropertyGroup>
 
   <ItemGroup>