diff --git a/Engine.Core/Engine.Core.csproj b/Engine.Core/Engine.Core.csproj
index b71dec1..402f9f6 100644
--- a/Engine.Core/Engine.Core.csproj
+++ b/Engine.Core/Engine.Core.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>false</ImplicitUsings>
     <Nullable>enable</Nullable>
     <RootNamespace>Syntriax.Engine.Core</RootNamespace>
diff --git a/Engine.Physics2D/Engine.Physics2D.csproj b/Engine.Physics2D/Engine.Physics2D.csproj
index ba7ce86..cb5ad55 100644
--- a/Engine.Physics2D/Engine.Physics2D.csproj
+++ b/Engine.Physics2D/Engine.Physics2D.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>disable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <RootNamespace>Syntriax.Engine.Physics2D</RootNamespace>
diff --git a/Engine.Serializers/Engine.Serializers.Yaml/Engine.Serializers.Yaml.csproj b/Engine.Serializers/Engine.Serializers.Yaml/Engine.Serializers.Yaml.csproj
index c56d15f..c6c7d65 100644
--- a/Engine.Serializers/Engine.Serializers.Yaml/Engine.Serializers.Yaml.csproj
+++ b/Engine.Serializers/Engine.Serializers.Yaml/Engine.Serializers.Yaml.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>disable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <RootNamespace>Syntriax.Engine.Serializers.Yaml</RootNamespace>
diff --git a/Engine.Serializers/Engine.Serializers.Yaml/YamlSerializer.cs b/Engine.Serializers/Engine.Serializers.Yaml/YamlSerializer.cs
index 15d5f2f..41aaa5c 100644
--- a/Engine.Serializers/Engine.Serializers.Yaml/YamlSerializer.cs
+++ b/Engine.Serializers/Engine.Serializers.Yaml/YamlSerializer.cs
@@ -20,7 +20,7 @@ public class YamlSerializer : Core.Serialization.ISerializer
     private readonly EntityRegistry entityRegistry = null!;
     private readonly IProgressionTracker progressionTracker = null!;
 
-    private readonly System.Threading.Lock Lock = new();
+    private readonly object Lock = new();
 
     public YamlSerializer()
     {
diff --git a/Engine.Systems/Engine.Systems.csproj b/Engine.Systems/Engine.Systems.csproj
index 967f31f..b96ddd5 100644
--- a/Engine.Systems/Engine.Systems.csproj
+++ b/Engine.Systems/Engine.Systems.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>disable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <RootNamespace>Syntriax.Engine.Systems</RootNamespace>
diff --git a/Engine/Engine.csproj b/Engine/Engine.csproj
index be663c5..9ad680a 100644
--- a/Engine/Engine.csproj
+++ b/Engine/Engine.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net9.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>disable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <RootNamespace>Syntriax.Engine</RootNamespace>