diff --git a/Directory.Build.props b/Directory.Build.props
index 8c1cd2321..c63453a76 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -4,7 +4,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <VersionPrefix>1.1.10</VersionPrefix>
+    <VersionPrefix>1.2.0</VersionPrefix>
   </PropertyGroup>
 
   <Choose>
diff --git a/examples/WireMock.Net.Console.Net452.Classic/MainApp.cs b/examples/WireMock.Net.Console.Net452.Classic/MainApp.cs
index a18744224..1e2763d66 100644
--- a/examples/WireMock.Net.Console.Net452.Classic/MainApp.cs
+++ b/examples/WireMock.Net.Console.Net452.Classic/MainApp.cs
@@ -61,8 +61,6 @@ public static void Run()
                     handlebarsContext.RegisterHelper(transformer.Name, transformer.Render);
                 },
 
-                AllowAnyHttpStatusCodeInResponse = true
-
                 // Uncomment below if you want to use the CustomFileSystemFileHandler
                 // FileSystemHandler = new CustomFileSystemFileHandler()
             });
diff --git a/src/WireMock.Net/Owin/IWireMockMiddlewareOptions.cs b/src/WireMock.Net/Owin/IWireMockMiddlewareOptions.cs
index 1a89533d5..65acc007c 100644
--- a/src/WireMock.Net/Owin/IWireMockMiddlewareOptions.cs
+++ b/src/WireMock.Net/Owin/IWireMockMiddlewareOptions.cs
@@ -40,7 +40,7 @@ internal interface IWireMockMiddlewareOptions
 
         bool? AllowBodyForAllHttpMethods { get; set; }
 
-        bool? AllowAnyHttpStatusCodeInResponse { get; set; }
+        bool? AllowOnlyDefinedHttpStatusCodeInResponse { get; set; }
 
         bool? DisableJsonBodyParsing { get; set; }
     }
diff --git a/src/WireMock.Net/Owin/Mappers/OwinResponseMapper.cs b/src/WireMock.Net/Owin/Mappers/OwinResponseMapper.cs
index e2a89d8b4..365d50bc0 100644
--- a/src/WireMock.Net/Owin/Mappers/OwinResponseMapper.cs
+++ b/src/WireMock.Net/Owin/Mappers/OwinResponseMapper.cs
@@ -104,12 +104,12 @@ public async Task MapAsync(ResponseMessage responseMessage, IResponse response)
 
         private int MapStatusCode(int code)
         {
-            if (_options.AllowAnyHttpStatusCodeInResponse == true || Enum.IsDefined(typeof(HttpStatusCode), code))
+            if (_options.AllowOnlyDefinedHttpStatusCodeInResponse == true && !Enum.IsDefined(typeof(HttpStatusCode), code))
             {
-                return code;
+                return (int)HttpStatusCode.OK;
             }
 
-            return (int)HttpStatusCode.OK;
+            return code;
         }
 
         private bool IsFault(ResponseMessage responseMessage)
diff --git a/src/WireMock.Net/Owin/WireMockMiddlewareOptions.cs b/src/WireMock.Net/Owin/WireMockMiddlewareOptions.cs
index 3599a249b..d0be329f8 100644
--- a/src/WireMock.Net/Owin/WireMockMiddlewareOptions.cs
+++ b/src/WireMock.Net/Owin/WireMockMiddlewareOptions.cs
@@ -43,8 +43,8 @@ internal class WireMockMiddlewareOptions : IWireMockMiddlewareOptions
         /// <inheritdoc cref="IWireMockMiddlewareOptions.AllowBodyForAllHttpMethods"/>
         public bool? AllowBodyForAllHttpMethods { get; set; }
 
-        /// <inheritdoc cref="IWireMockMiddlewareOptions.AllowAnyHttpStatusCodeInResponse"/>
-        public bool? AllowAnyHttpStatusCodeInResponse { get; set; }
+        /// <inheritdoc cref="IWireMockMiddlewareOptions.AllowOnlyDefinedHttpStatusCodeInResponse"/>
+        public bool? AllowOnlyDefinedHttpStatusCodeInResponse { get; set; }
 
         /// <inheritdoc cref="IWireMockMiddlewareOptions.DisableResponseBodyParsing"/>
         public bool? DisableJsonBodyParsing { get; set; }
diff --git a/src/WireMock.Net/ResponseBuilders/IStatusCodeResponseBuilder.cs b/src/WireMock.Net/ResponseBuilders/IStatusCodeResponseBuilder.cs
index 41777664b..5bcda2e1a 100644
--- a/src/WireMock.Net/ResponseBuilders/IStatusCodeResponseBuilder.cs
+++ b/src/WireMock.Net/ResponseBuilders/IStatusCodeResponseBuilder.cs
@@ -1,4 +1,5 @@
 using System.Net;
+using WireMock.Settings;
 
 namespace WireMock.ResponseBuilders
 {
@@ -9,6 +10,7 @@ public interface IStatusCodeResponseBuilder : IHeadersResponseBuilder
     {
         /// <summary>
         /// The with status code.
+        /// By default all status codes are allowed, to change this behaviour, see <inheritdoc cref="IWireMockServerSettings.AllowOnlyDefinedHttpStatusCodeInResponse"/>.
         /// </summary>
         /// <param name="code">The code.</param>
         /// <returns>The <see cref="IResponseBuilder"/>.</returns>
@@ -16,6 +18,7 @@ public interface IStatusCodeResponseBuilder : IHeadersResponseBuilder
 
         /// <summary>
         /// The with status code.
+        /// By default all status codes are allowed, to change this behaviour, see <inheritdoc cref="IWireMockServerSettings.AllowOnlyDefinedHttpStatusCodeInResponse"/>.
         /// </summary>
         /// <param name="code">The code.</param>
         /// <returns>The <see cref="IResponseBuilder"/>.</returns>
@@ -23,6 +26,7 @@ public interface IStatusCodeResponseBuilder : IHeadersResponseBuilder
 
         /// <summary>
         /// The with status code.
+        /// By default all status codes are allowed, to change this behaviour, see <inheritdoc cref="IWireMockServerSettings.AllowOnlyDefinedHttpStatusCodeInResponse"/>.
         /// </summary>
         /// <param name="code">The code.</param>
         /// <returns>The <see cref="IResponseBuilder"/>.</returns>
diff --git a/src/WireMock.Net/Server/WireMockServer.cs b/src/WireMock.Net/Server/WireMockServer.cs
index 9eaaad8fe..328aa14f3 100644
--- a/src/WireMock.Net/Server/WireMockServer.cs
+++ b/src/WireMock.Net/Server/WireMockServer.cs
@@ -269,10 +269,10 @@ protected WireMockServer(IWireMockServerSettings settings)
                 _settings.Logger.Info("AllowBodyForAllHttpMethods is set to True");
             }
 
-            if (settings.AllowAnyHttpStatusCodeInResponse == true)
+            if (settings.AllowOnlyDefinedHttpStatusCodeInResponse == true)
             {
-                _options.AllowAnyHttpStatusCodeInResponse = _settings.AllowAnyHttpStatusCodeInResponse;
-                _settings.Logger.Info("AllowAnyHttpStatusCodeInResponse is set to True");
+                _options.AllowOnlyDefinedHttpStatusCodeInResponse = _settings.AllowOnlyDefinedHttpStatusCodeInResponse;
+                _settings.Logger.Info("AllowOnlyDefinedHttpStatusCodeInResponse is set to True");
             }
 
             if (settings.AllowPartialMapping == true)
diff --git a/src/WireMock.Net/Settings/IWireMockServerSettings.cs b/src/WireMock.Net/Settings/IWireMockServerSettings.cs
index d11490b81..fe0e2798f 100644
--- a/src/WireMock.Net/Settings/IWireMockServerSettings.cs
+++ b/src/WireMock.Net/Settings/IWireMockServerSettings.cs
@@ -139,10 +139,12 @@ public interface IWireMockServerSettings
         bool? AllowBodyForAllHttpMethods { get; set; }
 
         /// <summary>
-        /// Allow any HttpStatusCode in the response. Also null, 0, empty or invalid. (default set to false).
+        /// Allow only a HttpStatus Code in the response which is defined. (default set to false).
+        /// - false : also null, 0, empty or invalid HttpStatus codes are allowed.
+        /// - true  : only codes defined in <see cref="System.Net.HttpStatusCode"/> are allowed.
         /// </summary>
         /// [PublicAPI]
-        bool? AllowAnyHttpStatusCodeInResponse { get; set; }
+        bool? AllowOnlyDefinedHttpStatusCodeInResponse { get; set; }
 
         /// <summary>
         /// Set to true to disable Json deserialization when processing requests. (default set to false).
diff --git a/src/WireMock.Net/Settings/WireMockServerSettings.cs b/src/WireMock.Net/Settings/WireMockServerSettings.cs
index f05b993d6..5debcf652 100644
--- a/src/WireMock.Net/Settings/WireMockServerSettings.cs
+++ b/src/WireMock.Net/Settings/WireMockServerSettings.cs
@@ -102,8 +102,8 @@ public class WireMockServerSettings : IWireMockServerSettings
         [PublicAPI]
         public bool? AllowBodyForAllHttpMethods { get; set; }
 
-        /// <inheritdoc cref="IWireMockServerSettings.AllowAnyHttpStatusCodeInResponse"/>
-        public bool? AllowAnyHttpStatusCodeInResponse { get; set; }
+        /// <inheritdoc cref="IWireMockServerSettings.AllowOnlyDefinedHttpStatusCodeInResponse"/>
+        public bool? AllowOnlyDefinedHttpStatusCodeInResponse { get; set; }
 
         /// <inheritdoc cref="IWireMockServerSettings.DisableJsonBodyParsing"/>
         [PublicAPI]
diff --git a/src/WireMock.Net/Settings/WireMockServerSettingsParser.cs b/src/WireMock.Net/Settings/WireMockServerSettingsParser.cs
index ed5c0ecf5..62aa48ce3 100644
--- a/src/WireMock.Net/Settings/WireMockServerSettingsParser.cs
+++ b/src/WireMock.Net/Settings/WireMockServerSettingsParser.cs
@@ -35,7 +35,7 @@ public static IWireMockServerSettings ParseArguments([NotNull] string[] args, [C
                 RequestLogExpirationDuration = parser.GetIntValue("RequestLogExpirationDuration"),
                 AllowCSharpCodeMatcher = parser.GetBoolValue("AllowCSharpCodeMatcher"),
                 AllowBodyForAllHttpMethods = parser.GetBoolValue("AllowBodyForAllHttpMethods"),
-                AllowAnyHttpStatusCodeInResponse = parser.GetBoolValue("AllowAnyHttpStatusCodeInResponse"),
+                AllowOnlyDefinedHttpStatusCodeInResponse = parser.GetBoolValue("AllowOnlyDefinedHttpStatusCodeInResponse"),
                 DisableJsonBodyParsing = parser.GetBoolValue("DisableJsonBodyParsing")
             };
 
diff --git a/test/WireMock.Net.Tests/Owin/Mappers/OwinResponseMapperTests.cs b/test/WireMock.Net.Tests/Owin/Mappers/OwinResponseMapperTests.cs
index a542ca77b..caf662c96 100644
--- a/test/WireMock.Net.Tests/Owin/Mappers/OwinResponseMapperTests.cs
+++ b/test/WireMock.Net.Tests/Owin/Mappers/OwinResponseMapperTests.cs
@@ -69,14 +69,33 @@ public async Task OwinResponseMapper_MapAsync_Null()
             await _sut.MapAsync(null, _responseMock.Object);
         }
 
+        [Theory]
+        [InlineData(300, 300)]
+        [InlineData(500, 500)]
+        public async Task OwinResponseMapper_MapAsync_Valid_StatusCode(object code, int expected)
+        {
+            // Arrange
+            var responseMessage = new ResponseMessage
+            {
+                StatusCode = code
+            };
+
+            // Act
+            await _sut.MapAsync(responseMessage, _responseMock.Object);
+
+            // Assert
+            _responseMock.VerifySet(r => r.StatusCode = expected, Times.Once);
+        }
+
         [Theory]
         [InlineData(0, 200)]
         [InlineData(-1, 200)]
         [InlineData(10000, 200)]
         [InlineData(300, 300)]
-        public async Task OwinResponseMapper_MapAsync_StatusCode(object code, int expected)
+        public async Task OwinResponseMapper_MapAsync_Invalid_StatusCode_When_AllowOnlyDefinedHttpStatusCodeInResponseSet_Is_True(object code, int expected)
         {
             // Arrange
+            _optionsMock.SetupGet(o => o.AllowOnlyDefinedHttpStatusCodeInResponse).Returns(true);
             var responseMessage = new ResponseMessage
             {
                 StatusCode = code
@@ -90,9 +109,10 @@ public async Task OwinResponseMapper_MapAsync_StatusCode(object code, int expect
         }
 
         [Fact]
-        public async Task OwinResponseMapper_MapAsync_StatusCodeNull()
+        public async Task OwinResponseMapper_MapAsync_Null_StatusCode_When_AllowOnlyDefinedHttpStatusCodeInResponseSet_Is_True()
         {
             // Arrange
+            _optionsMock.SetupGet(o => o.AllowOnlyDefinedHttpStatusCodeInResponse).Returns(true);
             var responseMessage = new ResponseMessage
             {
                 StatusCode = null
@@ -105,42 +125,40 @@ public async Task OwinResponseMapper_MapAsync_StatusCodeNull()
             _responseMock.VerifyNoOtherCalls();
         }
 
-        [Theory]
-        [InlineData(0, 0)]
-        [InlineData(-1, -1)]
-        [InlineData(10000, 10000)]
-        [InlineData(300, 300)]
-        public async Task OwinResponseMapper_MapAsync_StatusCode_WithAllowAll(object code, int expected)
+        [Fact]
+        public async Task OwinResponseMapper_MapAsync_StatusCode_Is_Null()
         {
             // Arrange
-            _optionsMock.SetupGet(o => o.AllowAnyHttpStatusCodeInResponse).Returns(true);
             var responseMessage = new ResponseMessage
             {
-                StatusCode = code
+                StatusCode = null
             };
 
             // Act
             await _sut.MapAsync(responseMessage, _responseMock.Object);
 
             // Assert
-            _responseMock.VerifySet(r => r.StatusCode = expected, Times.Once);
+            _responseMock.VerifyNoOtherCalls();
         }
 
-        [Fact]
-        public async Task OwinResponseMapper_MapAsync_StatusCode_WithAllowAll_Null()
+        [Theory]
+        [InlineData(0, 0)]
+        [InlineData(-1, -1)]
+        [InlineData(10000, 10000)]
+        [InlineData(300, 300)]
+        public async Task OwinResponseMapper_MapAsync_StatusCode_Is_NotInEnumRange(object code, int expected)
         {
             // Arrange
-            _optionsMock.SetupGet(o => o.AllowAnyHttpStatusCodeInResponse).Returns(true);
             var responseMessage = new ResponseMessage
             {
-                StatusCode = null
+                StatusCode = code
             };
 
             // Act
             await _sut.MapAsync(responseMessage, _responseMock.Object);
 
             // Assert
-            _responseMock.VerifyNoOtherCalls();
+            _responseMock.VerifySet(r => r.StatusCode = expected, Times.Once);
         }
 
         [Fact]
diff --git a/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj b/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj
index b0bade621..d788bc427 100644
--- a/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj
+++ b/test/WireMock.Net.Tests/WireMock.Net.Tests.csproj
@@ -19,6 +19,10 @@
     <AssemblyOriginatorKeyFile>../../src/WireMock.Net/WireMock.Net.snk</AssemblyOriginatorKeyFile>
     <!--<DelaySign>true</DelaySign>-->
     <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
+
+    <!--https://developercommunity.visualstudio.com/content/problem/26347/unit-tests-fail-with-fileloadexception-newtonsoftj-1.html-->
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)' == 'Release'">
diff --git a/test/WireMock.Net.Tests/WireMockServer.Settings.cs b/test/WireMock.Net.Tests/WireMockServer.Settings.cs
index ecb5c3d92..2a40d43c1 100644
--- a/test/WireMock.Net.Tests/WireMockServer.Settings.cs
+++ b/test/WireMock.Net.Tests/WireMockServer.Settings.cs
@@ -141,21 +141,21 @@ public void WireMockServer_WireMockServerSettings_AllowBodyForAllHttpMethods()
         }
 
         [Fact]
-        public void WireMockServer_WireMockServerSettings_AllowAnyHttpStatusCodeInResponse()
+        public void WireMockServer_WireMockServerSettings_AllowOnlyDefinedHttpStatusCodeInResponse()
         {
             // Assign and Act
             var server = WireMockServer.Start(new WireMockServerSettings
             {
                 Logger = _loggerMock.Object,
-                AllowAnyHttpStatusCodeInResponse = true
+                AllowOnlyDefinedHttpStatusCodeInResponse = true
             });
 
             // Assert
             var options = server.GetPrivateFieldValue<IWireMockMiddlewareOptions>("_options");
-            Check.That(options.AllowAnyHttpStatusCodeInResponse).Equals(true);
+            Check.That(options.AllowOnlyDefinedHttpStatusCodeInResponse).Equals(true);
 
             // Verify
-            _loggerMock.Verify(l => l.Info(It.Is<string>(s => s.Contains("AllowAnyHttpStatusCodeInResponse") && s.Contains("True"))));
+            _loggerMock.Verify(l => l.Info(It.Is<string>(s => s.Contains("AllowOnlyDefinedHttpStatusCodeInResponse") && s.Contains("True"))));
         }
 
         [Fact]