diff --git a/Directory.Build.props b/Directory.Build.props
index 430ae8a26..f60585a24 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -2,7 +2,7 @@
   <Import Project=".\scripts\sdk\Sdk.props" />
 
   <PropertyGroup>
-    <LangVersion>8</LangVersion>
+    <LangVersion>9</LangVersion>
     <NoWarn>$(NoWarn);1573;1591;1712</NoWarn>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
 
diff --git a/README.md b/README.md
index 874505202..e9973bbf8 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ Have a question? Come and talk to us: [![Gitter](https://badges.gitter.im/Join%2
       Development
     </td>
     <td>
-      MS VS 2019, C# 8<br />
+      MS VS 2019 (v16.8+), C# 9<br />
       VC++ (inc. ATL for x86/x64 for installer)
     </td>
   </tr>