diff --git a/osu.Game.Resources/osu.Game.Resources.csproj b/osu.Game.Resources/osu.Game.Resources.csproj
index 48dc585..f94dc74 100644
--- a/osu.Game.Resources/osu.Game.Resources.csproj
+++ b/osu.Game.Resources/osu.Game.Resources.csproj
@@ -21,6 +21,7 @@
     <DefineConstants>DEBUG;TRACE</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
+    <LangVersion>6</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
     <DebugType>pdbonly</DebugType>