diff --git a/SabreTools.Models.csproj b/SabreTools.Models.csproj
index 9307ad6..698b090 100644
--- a/SabreTools.Models.csproj
+++ b/SabreTools.Models.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <!-- Assembly Properties -->
-    <TargetFrameworks>net48;net6.0;net7.0;net8.0</TargetFrameworks>
+    <TargetFrameworks>net48;netcoreapp3.1;net6.0;net7.0;net8.0</TargetFrameworks>
     <RuntimeIdentifiers>win-x86;win-x64;linux-x64;osx-x64</RuntimeIdentifiers>
     <Version>1.1.5</Version>
 
@@ -19,6 +19,7 @@
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(TargetFramework)'!='net48'">
+    <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
   </PropertyGroup>