diff --git a/src/Umbraco.Core/Umbraco.Core.csproj b/src/Umbraco.Core/Umbraco.Core.csproj
index 7a15e7fbed..52322f979a 100644
--- a/src/Umbraco.Core/Umbraco.Core.csproj
+++ b/src/Umbraco.Core/Umbraco.Core.csproj
@@ -2,7 +2,7 @@
 
     <PropertyGroup>
         <TargetFramework>netstandard2.0</TargetFramework>
-        <LangVersion>8</LangVersion>
+        <LangVersion>7.3</LangVersion>
         <RootNamespace>Umbraco.Core</RootNamespace>
         <AssemblyVersion>9.0.0</AssemblyVersion>
         <InformationalVersion>9.0.0</InformationalVersion>