diff --git a/Telegrator.Hosting.Web/Telegrator.Hosting.Web.csproj b/Telegrator.Hosting.Web/Telegrator.Hosting.Web.csproj
index cd0ecc2..0ca4cb4 100644
--- a/Telegrator.Hosting.Web/Telegrator.Hosting.Web.csproj
+++ b/Telegrator.Hosting.Web/Telegrator.Hosting.Web.csproj
@@ -15,7 +15,7 @@
 	<EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
 	<PackageLicenseFile>LICENSE</PackageLicenseFile>
 	<PackageReadmeFile>README.md</PackageReadmeFile>
-	<Version>1.15.3</Version>
+	<Version>1.15.4</Version>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/Telegrator.Hosting/Telegrator.Hosting.csproj b/Telegrator.Hosting/Telegrator.Hosting.csproj
index 822f40b..628ddbe 100644
--- a/Telegrator.Hosting/Telegrator.Hosting.csproj
+++ b/Telegrator.Hosting/Telegrator.Hosting.csproj
@@ -16,7 +16,7 @@
 	  <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
 	  <PackageLicenseFile>LICENSE</PackageLicenseFile>
 	  <PackageReadmeFile>README.md</PackageReadmeFile>
-	  <Version>1.15.3</Version>
+	  <Version>1.15.4</Version>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/Telegrator/MadiatorCore/Descriptors/DescriptorAspectsSet.cs b/Telegrator/MadiatorCore/Descriptors/DescriptorAspectsSet.cs
index 4a20260..ac2aabe 100644
--- a/Telegrator/MadiatorCore/Descriptors/DescriptorAspectsSet.cs
+++ b/Telegrator/MadiatorCore/Descriptors/DescriptorAspectsSet.cs
@@ -10,16 +10,6 @@ namespace Telegrator.MadiatorCore.Descriptors
     /// </summary>
     public sealed class DescriptorAspectsSet
     {
-        /// <summary>
-        /// Gets a value indicating whether the handler implements <see cref="IPreProcessor"/>.
-        /// </summary>
-        public bool SelfPre { get; private set; }
-
-        /// <summary>
-        /// Gets a value indicating whether the handler implements <see cref="IPostProcessor"/>.
-        /// </summary>
-        public bool SelfPost { get; private set; }
-
         /// <summary>
         /// Gets the type of the external pre-processor, if specified via <see cref="BeforeExecutionAttribute{T}"/>.
         /// </summary>
@@ -33,14 +23,10 @@ namespace Telegrator.MadiatorCore.Descriptors
         /// <summary>
         /// Initializes a new instance of the <see cref="DescriptorAspectsSet"/> class.
         /// </summary>
-        /// <param name="selfPre">Whether the handler implements <see cref="IPreProcessor"/>.</param>
         /// <param name="typedPre">The type of external pre-processor, if any.</param>
-        /// <param name="selfPost">Whether the handler implements <see cref="IPostProcessor"/>.</param>
         /// <param name="typedPost">The type of external post-processor, if any.</param>
-        public DescriptorAspectsSet(bool selfPre, Type? typedPre, bool selfPost, Type? typedPost)
+        public DescriptorAspectsSet(Type? typedPre, Type? typedPost)
         {
-            SelfPre = selfPre;
-            SelfPost = selfPost;
             TypedPre = typedPre;
             TypedPost = typedPost;
         }
@@ -55,16 +41,13 @@ namespace Telegrator.MadiatorCore.Descriptors
         /// <exception cref="InvalidOperationException">Thrown when handler claims to implement <see cref="IPreProcessor"/> but doesn't.</exception>
         public async Task<Result> ExecutePre(UpdateHandlerBase handler, IHandlerContainer container, CancellationToken cancellationToken)
         {
-            if (SelfPre)
+            if (handler is  IPreProcessor preProcessor)
             {
-                if (handler is not IPreProcessor preProcessor)
-                    throw new InvalidOperationException();
-
                 return await preProcessor.BeforeExecution(container, cancellationToken).ConfigureAwait(false);
             }
             else if (TypedPre != null)
             {
-                IPreProcessor preProcessor = (IPreProcessor)Activator.CreateInstance(TypedPre);
+                preProcessor = (IPreProcessor)Activator.CreateInstance(TypedPre);
                 return await preProcessor.BeforeExecution(container, cancellationToken).ConfigureAwait(false);
             }
 
@@ -81,16 +64,13 @@ namespace Telegrator.MadiatorCore.Descriptors
         /// <exception cref="InvalidOperationException">Thrown when handler claims to implement <see cref="IPostProcessor"/> but doesn't.</exception>
         public async Task<Result> ExecutePost(UpdateHandlerBase handler, IHandlerContainer container, CancellationToken cancellationToken)
         {
-            if (SelfPost)
+            if (handler is IPostProcessor postProcessor)
             {
-                if (handler is not IPostProcessor postProcessor)
-                    throw new InvalidOperationException();
-
                 return await postProcessor.AfterExecution(container, cancellationToken).ConfigureAwait(false);
             }
             else if (TypedPost != null)
             {
-                IPostProcessor postProcessor = (IPostProcessor)Activator.CreateInstance(TypedPost);
+                postProcessor = (IPostProcessor)Activator.CreateInstance(TypedPost);
                 return await postProcessor.AfterExecution(container, cancellationToken).ConfigureAwait(false);
             }
 
diff --git a/Telegrator/MadiatorCore/Descriptors/HandlerInspector.cs b/Telegrator/MadiatorCore/Descriptors/HandlerInspector.cs
index 8e892db..99f9966 100644
--- a/Telegrator/MadiatorCore/Descriptors/HandlerInspector.cs
+++ b/Telegrator/MadiatorCore/Descriptors/HandlerInspector.cs
@@ -90,26 +90,9 @@ namespace Telegrator.MadiatorCore.Descriptors
         /// <returns>A <see cref="DescriptorAspectsSet"/> containing the aspects configuration.</returns>
         public static DescriptorAspectsSet GetAspects(Type handlerType)
         {
-            bool selfPre = handlerType.GetInterface(nameof(IPreProcessor)) != null;
-            bool selfPost = handlerType.GetInterface(nameof(IPostProcessor)) != null;
-            Type? typedPre = null;
-            Type? typedPost = null;
-
-            if (!selfPre)
-            {
-                Attribute? preAttr = handlerType.GetCustomAttribute(typeof(BeforeExecutionAttribute<>));
-                if (preAttr != null)
-                    typedPre = preAttr.GetType().GetGenericArguments()[0];
-            }
-
-            if (!selfPost)
-            {
-                Attribute? postAttr = handlerType.GetCustomAttribute(typeof(AfterExecutionAttribute<>));
-                if (postAttr != null)
-                    typedPost = postAttr.GetType().GetGenericArguments()[0];
-            }
-
-            return new DescriptorAspectsSet(selfPre, typedPre, selfPost, typedPost);
+            Type? typedPre = handlerType.GetCustomAttribute(typeof(BeforeExecutionAttribute<>))?.GetType().GetGenericArguments()[0];
+            Type? typedPost = handlerType.GetCustomAttribute(typeof(AfterExecutionAttribute<>)).GetType().GetGenericArguments()[0];
+            return new DescriptorAspectsSet(typedPre, typedPost);
         }
     }
 }
diff --git a/Telegrator/Telegrator.csproj b/Telegrator/Telegrator.csproj
index f08ca91..f5b6b74 100644
--- a/Telegrator/Telegrator.csproj
+++ b/Telegrator/Telegrator.csproj
@@ -17,7 +17,7 @@
     <PackageTags>telegram;bot;mediator;attributes;aspect;hosting;host;framework;easy;simple;handlers</PackageTags>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
-    <Version>1.15.3</Version>
+    <Version>1.15.4</Version>
   </PropertyGroup>
 
   <ItemGroup>