diff --git a/AspNet/AspNet.csproj b/AspNet/AspNet.csproj
index f4a5453..0fbe596 100644
--- a/AspNet/AspNet.csproj
+++ b/AspNet/AspNet.csproj
@@ -17,7 +17,7 @@
         <FileVersion>1.0.0.0</FileVersion>
         <VersionSuffix>0.0</VersionSuffix>
         <PackageVersion>1.1.$(VersionSuffix)</PackageVersion>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFramework>netstandard2.1</TargetFramework>
     </PropertyGroup>
     <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
         <DocumentationFile>bin\Debug\Core.xml</DocumentationFile>
@@ -27,6 +27,7 @@
     </PropertyGroup>
     <ItemGroup>
       <PackageReference Include="protobuf-net" Version="3.0.62" />
+      <PackageReference Include="System.Text.Json" Version="5.0.0" />
     </ItemGroup>
 
 </Project>
diff --git a/AspNet/DictionaryGuidConverter.cs b/AspNet/DictionaryGuidConverter.cs
index 3dd98c3..7ca2bf4 100644
--- a/AspNet/DictionaryGuidConverter.cs
+++ b/AspNet/DictionaryGuidConverter.cs
@@ -67,7 +67,7 @@ namespace CC_Functions.AspNet
                     throw new JsonException();
                 }
 
-                Dictionary<Guid, TValue> dictionary = new();
+                Dictionary<Guid, TValue> dictionary = new Dictionary<Guid, TValue>();
 
                 while (reader.Read())
                 {