diff --git a/sdk/DTO/TransitionDefinition.cs b/sdk/DTO/TransitionDefinition.cs
index 247c65b..506789c 100644
--- a/sdk/DTO/TransitionDefinition.cs
+++ b/sdk/DTO/TransitionDefinition.cs
@@ -9,6 +9,6 @@ public class TransitionDefinition
 
         [JsonPropertyName("message")] public MessageDefinition Message { get; set; }
 
-        [JsonExtensionData] public Dictionary<string, object> AdditionalData { get; set; } = new();
+        [JsonExtensionData] public Dictionary<string, object> AdditionalData { get; set; } = new Dictionary<string, object>();
     }
 }
diff --git a/test/EAVFramework.UnitTest/EAVFramework.UnitTest.csproj b/test/EAVFramework.UnitTest/EAVFramework.UnitTest.csproj
index 5781c0d..22cad47 100644
--- a/test/EAVFramework.UnitTest/EAVFramework.UnitTest.csproj
+++ b/test/EAVFramework.UnitTest/EAVFramework.UnitTest.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-	  <TargetFrameworks>netcoreapp3.1;net6.0</TargetFrameworks>
+	  <TargetFrameworks>netcoreapp3.1;net6.0;net8.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
     <UserSecretsId>5530110b-f598-40fb-a452-3a16fa69df9e</UserSecretsId>