diff --git a/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs b/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs
index baba616..0dfd21c 100644
--- a/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs
+++ b/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs
@@ -58,6 +58,12 @@ public ModelConstructorHasParameters(int intField)
     }
 
 
+    public class UnsupportedTypes
+    {
+        public byte[] ByteArray { get; set; }
+    }
+
+
     public class ModelConstructorMixed
     {
         public ModelConstructorMixed()
diff --git a/src/StubGenerator.Test/CacheManagerTests.cs b/src/StubGenerator.Test/CacheManagerTests.cs
index 535a755..3fe64a6 100644
--- a/src/StubGenerator.Test/CacheManagerTests.cs
+++ b/src/StubGenerator.Test/CacheManagerTests.cs
@@ -16,14 +16,14 @@ public CacheManagerTests()
             _stubTypeMemoryCache = new MemoryStubTypeCache(_cacheKeyGenerator);
         }
 
-        [Fact(DisplayName = "Cache_Key_Generator_Test")]
+        [Fact(DisplayName = "Cache Key Generator Test")]
         public void CacheKeyGeneratorTest()
         {
             var cacheKey = _cacheKeyGenerator.GenerateKey<PersonDto>();
             Assert.NotEmpty(cacheKey);
         }
 
-        [Fact(DisplayName = "Should add PropertyInfo Cache Successfully")]
+        [Fact(DisplayName = "Should Add PropertyInfo Cache Successfully")]
         public void Should_Add_PropertyInfos_To_Cache_Successfully()
         {
             var personData = new PersonDto();
@@ -33,7 +33,7 @@ public void Should_Add_PropertyInfos_To_Cache_Successfully()
         }
 
 
-        [Fact(DisplayName = "Memory_Cache_Manager_Empty_Test")]
+        [Fact(DisplayName = "Ensure Memory Cache Manager Empty")]
         public void CacheManagerEmptyTest()
         {
             var personData = new PersonDto();
@@ -43,7 +43,7 @@ public void CacheManagerEmptyTest()
         }
 
 
-        [Fact(DisplayName = "Memory_Cache_Manager_Concurrency_Test")]
+        [Fact(DisplayName = "Memory Cache Manager Concurrency")]
         public void CacheManagerConcurrencyTest()
         {
             var personData = new PersonDto();
diff --git a/src/StubGenerator.Test/StubManagerTests.cs b/src/StubGenerator.Test/StubManagerTests.cs
index d782287..f8084b9 100644
--- a/src/StubGenerator.Test/StubManagerTests.cs
+++ b/src/StubGenerator.Test/StubManagerTests.cs
@@ -155,5 +155,14 @@ public void Should_Generate_Data_For_Complex_Type_Properties_Check_Parameterless
             Assert.NotNull(generatedStubData.ModelConstructorMixed);
             Assert.Null(generatedStubData.ModelConstructorHasParameters);
         }
+
+
+        [Fact(DisplayName = "Check Unsupported Types")]
+        public void Check_Unsupported_Types()
+        {
+            var generatedStubData = _stubManager.CreateNew<UnsupportedTypes>();
+            Assert.NotNull(generatedStubData);
+            Assert.Null(generatedStubData.ByteArray);
+        }
     }
 }
diff --git a/src/StubMiddleware.Core/Core/StubManager.cs b/src/StubMiddleware.Core/Core/StubManager.cs
index 181974e..d392a4a 100644
--- a/src/StubMiddleware.Core/Core/StubManager.cs
+++ b/src/StubMiddleware.Core/Core/StubManager.cs
@@ -73,15 +73,18 @@ private void FillPropertiesWithFakeData<TObject>(TObject obj, PropertyInfo[] pro
             foreach (PropertyInfo property in propertyInfos)
             {
                 if (property.PropertyType.IsCollectionType())
-                {
-                    var collectionTypeInstance = Activator.CreateInstance(property.PropertyType);
-                    var complexType = property.PropertyType.GetGenericArguments()[0];
-                    property.SetValue(obj, collectionTypeInstance);
-                    for (var i = 0; i < listItemSize; i++)
+                {      /*check the type has parameterless constructor*/
+                    if ((property.PropertyType.GetConstructor(Type.EmptyTypes) != null))
                     {
-                        dynamic item = Activator.CreateInstance(complexType);
-                        FillPropertiesWithFakeData(item, _stubTypeCache.GetOrAdd(item, property.PropertyType.GetGenericArguments()[0].GetProperties()));
-                        collectionTypeInstance.GetType().GetMethod("Add").Invoke(collectionTypeInstance, new[] { item });
+                        var collectionTypeInstance = Activator.CreateInstance(property.PropertyType);
+                        var complexType = property.PropertyType.GetGenericArguments()[0];
+                        property.SetValue(obj, collectionTypeInstance);
+                        for (var i = 0; i < listItemSize; i++)
+                        {
+                            dynamic item = Activator.CreateInstance(complexType);
+                            FillPropertiesWithFakeData(item, _stubTypeCache.GetOrAdd(item, property.PropertyType.GetGenericArguments()[0].GetProperties()));
+                            collectionTypeInstance.GetType().GetMethod("Add").Invoke(collectionTypeInstance, new[] { item });
+                        }
                     }
                 }
                 else
diff --git a/src/StubMiddleware.Core/StubGenerator.csproj b/src/StubMiddleware.Core/StubGenerator.csproj
index 9768918..dd97277 100644
--- a/src/StubMiddleware.Core/StubGenerator.csproj
+++ b/src/StubMiddleware.Core/StubGenerator.csproj
@@ -9,7 +9,7 @@
     <PackageProjectUrl>https://github.com/MCKanpolat/StubMiddleware</PackageProjectUrl>
     <RepositoryUrl>https://github.com/MCKanpolat/StubMiddleware</RepositoryUrl>
     <PackageTags>stub stubgenerator</PackageTags>
-    <Version>1.0.4</Version>
+    <Version>1.0.5</Version>
     <Description>Stub Data Generator for .net core</Description>
   </PropertyGroup>
 
diff --git a/src/StubMiddleware/StubMiddleware.csproj b/src/StubMiddleware/StubMiddleware.csproj
index 2b24410..4968897 100644
--- a/src/StubMiddleware/StubMiddleware.csproj
+++ b/src/StubMiddleware/StubMiddleware.csproj
@@ -11,8 +11,9 @@
     <Copyright></Copyright>
     <GeneratePackageOnBuild>false</GeneratePackageOnBuild>
     <Description>Stub Data Generator Middleware for Asp.Net core</Description>
-    <AssemblyVersion>1.0.4.0</AssemblyVersion>
-    <Version>1.0.4</Version>
+    <AssemblyVersion>1.0.5.0</AssemblyVersion>
+    <Version>1.0.5</Version>
+    <FileVersion>1.0.5.0</FileVersion>
   </PropertyGroup>
 
   <ItemGroup>