diff --git a/ListingManager.Tests/ListingManager.Tests.csproj b/ListingManager.Tests/ListingManager.Tests.csproj
index dfe8dd3..930d084 100644
--- a/ListingManager.Tests/ListingManager.Tests.csproj
+++ b/ListingManager.Tests/ListingManager.Tests.csproj
@@ -5,7 +5,7 @@
 
         <IsPackable>false</IsPackable>
 
-        <LangVersion>10</LangVersion>
+        <LangVersion>11</LangVersion>
 
         <Nullable>enable</Nullable>
     </PropertyGroup>
diff --git a/ListingManager/ListingManager.csproj b/ListingManager/ListingManager.csproj
index cb9244a..b349e2f 100644
--- a/ListingManager/ListingManager.csproj
+++ b/ListingManager/ListingManager.csproj
@@ -13,7 +13,7 @@
         <PackageId>IntelliTect.EssentialCSharp.ListingManager</PackageId>
         <Description>Tool used to expose useful functionality to IntelliTect/EssentialCSharp collaborators</Description>
         <PackageLicenseExpression>MIT</PackageLicenseExpression>
-        <LangVersion>10</LangVersion>
+        <LangVersion>11</LangVersion>
         <Nullable>enable</Nullable>
         <NoWarn>CS1591</NoWarn>
 		<PackageLicenseExpression>MIT</PackageLicenseExpression>