diff --git a/src/Sample/Model/Group.cs b/src/Sample/Model/Group.cs
index 3eb1a6bd..e73a0c4d 100644
--- a/src/Sample/Model/Group.cs
+++ b/src/Sample/Model/Group.cs
@@ -25,6 +25,7 @@ public partial class  Group : IContactContainer
     /// <inheritdoc/>
     [Browsable(false)]
     [XmlElement(nameof(Contact))]
+    [OrderedEquality]
     public List<Contact> Contacts { get; } = [];
 
     public override string ToString() => Name ?? "";
diff --git a/src/Sample/Sample.csproj b/src/Sample/Sample.csproj
index 2806e07d..e33b545c 100644
--- a/src/Sample/Sample.csproj
+++ b/src/Sample/Sample.csproj
@@ -24,8 +24,8 @@
   <!-- Dependencies -->
   <ItemGroup>
     <ProjectReference Include="..\StructureEditor.WinForms\StructureEditor.WinForms.csproj" />
-    <PackageReference Include="Generator.Equals" Version="3.3.0" PrivateAssets="All" />
-    <PackageReference Include="Generator.Equals.Runtime" Version="3.3.0" />
+    <PackageReference Include="Generator.Equals" Version="4.0.0" PrivateAssets="All" />
+    <PackageReference Include="Generator.Equals.Runtime" Version="4.0.0" />
   </ItemGroup>
 
 </Project>