diff --git a/MinimalRichDomain.sln b/MinimalRichDomain.sln
index da1241e..d47ecd3 100644
--- a/MinimalRichDomain.sln
+++ b/MinimalRichDomain.sln
@@ -49,7 +49,7 @@ Global
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{18ABF4ED-34E6-42B4-A242-BAD1739AAF17} = {FF69C4FB-2589-43CE-9CB7-E21B71838AE6}
-		{A62056DA-D2FC-49C2-92EE-D47D3BBED116} = {FF69C4FB-2589-43CE-9CB7-E21B71838AE6}
+		{A62056DA-D2FC-49C2-92EE-D47D3BBED116} = {10FA7376-ECEA-4A08-B3CC-0CA22DEC2690}
 		{CFDE6B77-F6EA-4C43-83BE-9B202B7F2C07} = {FF69C4FB-2589-43CE-9CB7-E21B71838AE6}
 		{C0025AF3-9E9C-4936-A286-C86CFD3F759F} = {10FA7376-ECEA-4A08-B3CC-0CA22DEC2690}
 	EndGlobalSection
diff --git a/src/MinimalRichDomain/AggregateRoot.cs b/src/MinimalRichDomain/AggregateRoot.cs
index 7c53157..61a757b 100644
--- a/src/MinimalRichDomain/AggregateRoot.cs
+++ b/src/MinimalRichDomain/AggregateRoot.cs
@@ -2,12 +2,14 @@
 using System.Reflection;
 
 namespace MinimalRichDomain;
-public abstract class AggregateRoot<TId>
+public abstract class AggregateRoot<TId> : IEntity<TId>
 {
     public IReadOnlyCollection<IDomainEvent> DomainEvents => _domainEvents.AsReadOnly();
     public TId Id { get; }
     public int CurrentVersion { get; private set; }
+
     protected int NextVersion => CurrentVersion + 1;
+
     private readonly List<IDomainEvent> _domainEvents;
 
     protected AggregateRoot(TId id)
@@ -58,7 +60,7 @@ protected virtual void RaiseAndApplyDomainEvent(IDomainEvent domainEvent)
         DomainEventTracker.RaiseDomainEvent(domainEvent);
     }
 
-    public virtual void Apply(IDomainEvent domainEvent)
+    protected virtual void Apply(IDomainEvent domainEvent)
     {
         if (CanApply(domainEvent))
         {
diff --git a/src/MinimalRichDomain/IApplyEvent.cs b/src/MinimalRichDomain/IApplyEvent.cs
index f660b23..0739e23 100644
--- a/src/MinimalRichDomain/IApplyEvent.cs
+++ b/src/MinimalRichDomain/IApplyEvent.cs
@@ -1,5 +1,8 @@
-namespace MinimalRichDomain;
+using System.ComponentModel;
+
+namespace MinimalRichDomain;
 public interface IApplyEvent<TEvent> where TEvent : IDomainEvent
 {
+    [EditorBrowsable(EditorBrowsableState.Never)]
     void Apply(TEvent @event);
 }
\ No newline at end of file
diff --git a/src/MinimalRichDomain/IEntity.cs b/src/MinimalRichDomain/IEntity.cs
new file mode 100644
index 0000000..5f4e6cb
--- /dev/null
+++ b/src/MinimalRichDomain/IEntity.cs
@@ -0,0 +1,5 @@
+namespace MinimalRichDomain;
+public interface IEntity<TId>
+{
+    TId Id { get; }
+}
\ No newline at end of file
diff --git a/src/MinimalRichDomain/MinimalRichDomain.csproj b/src/MinimalRichDomain/MinimalRichDomain.csproj
index 4a7df5e..5c56aab 100644
--- a/src/MinimalRichDomain/MinimalRichDomain.csproj
+++ b/src/MinimalRichDomain/MinimalRichDomain.csproj
@@ -3,7 +3,7 @@
 	<PropertyGroup>
 		<PackageId>MinimalRichDomain</PackageId>
 		<Title>Shared kernel for a minimal event-sourced rich domain model</Title>
-		<Version>0.1.3-alpha</Version>
+		<Version>0.1.4-alpha</Version>
 		<Authors>Ken van Grinsven</Authors>
 		<Company>Grinsven Software Solutions</Company>
 		<Product>MinimalRichDomain</Product>
diff --git a/test/MinimalRichDomain.Tests/AggregateRootTests.cs b/test/MinimalRichDomain.Tests/AggregateRootTests.cs
index 0621436..79df3b9 100644
--- a/test/MinimalRichDomain.Tests/AggregateRootTests.cs
+++ b/test/MinimalRichDomain.Tests/AggregateRootTests.cs
@@ -84,6 +84,11 @@ public TestEntity() : base(Guid.NewGuid())
 
         public TestEntity(IReadOnlyCollection<IDomainEvent> domainEvents) : base(Guid.NewGuid(), domainEvents) { }
 
+        public new void Apply(IDomainEvent domainEvent)
+        {
+            base.Apply(domainEvent);
+        }
+
         protected override void ValidateState()
         {
         }