diff --git a/Directory.Build.props b/Directory.Build.props
index 1f59f19eaa..235feea8ce 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -1,7 +1,7 @@
 <!-- Contains required properties for osu!framework projects. -->
 <Project>
   <PropertyGroup Label="C#">
-    <LangVersion>10.0</LangVersion>
+    <LangVersion>9.0</LangVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <Nullable>enable</Nullable>
   </PropertyGroup>