diff --git a/Directory.Build.props b/Directory.Build.props
index 3897256bf..8a8df22d7 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -5,7 +5,9 @@
         <TargetFramework>net10.0-windows</TargetFramework>
         <PlatformTarget>x64</PlatformTarget>
         <Platforms>x64</Platforms>
-        <LangVersion>14.0</LangVersion>
+
+        <!-- preview, as docfx is late at upgrading Roslyn versions -->
+        <LangVersion>preview</LangVersion>
 
         <!-- Disable Intel CET. Causes crashes on unpatched Windows 10 systems. -->
         <!-- https://github.com/dotnet/runtime/issues/108589 -->