Change the serialization from the WireMockServerSettings in the logging when WireMockServer is started

CHANGELOG.md

@@ -1,3 +1,8 @@
+# 2.11.0 (12 June 2026)
+- [#1475](https://github.com/wiremock/WireMock.Net/pull/1475) - Update NuGet packages (Aspire, MessagePack and more) [security] contributed by [StefH](https://github.com/StefH)
+- [#1476](https://github.com/wiremock/WireMock.Net/pull/1476) - Fix BodyParser [bug] contributed by [StefH](https://github.com/StefH)
+- [#1473](https://github.com/wiremock/WireMock.Net/issues/1473) - JsonPartialWildCardMatcher With DateTime Regex Stopped Matching (Regression?) [bug]
+
 # 2.10.0 (07 June 2026)
 - [#1472](https://github.com/wiremock/WireMock.Net/pull/1472) - Update JsonConverter to 0.13.0 [bug] contributed by [StefH](https://github.com/StefH)
 

Directory.Build.props

@@ -4,7 +4,7 @@
     </PropertyGroup>
 
     <PropertyGroup>
-        <VersionPrefix>2.10.0</VersionPrefix>
+        <VersionPrefix>2.11.0</VersionPrefix>
         <PackageIcon>WireMock.Net-Logo.png</PackageIcon>
         <PackageProjectUrl>https://github.com/wiremock/WireMock.Net</PackageProjectUrl>
         <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>

Generate-ReleaseNotes.cmd

@@ -1,6 +1,6 @@
 rem https://github.com/StefH/GitHubReleaseNotes
 
-SET version=2.10.0
+SET version=2.11.0
 
 GitHubReleaseNotes --output CHANGELOG.md --skip-empty-releases --exclude-labels wontfix test question invalid doc duplicate example environment --version %version% --token %GH_TOKEN%
 

PackageReleaseNotes.txt

@@ -1,4 +1,6 @@
-# 2.10.0 (07 June 2026)
+# 2.11.0 (12 June 2026)
-- #1472 Update JsonConverter to 0.13.0 [bug]
+- #1475 Update NuGet packages (Aspire, MessagePack and more) [security]
+- #1476 Fix BodyParser [bug]
+- #1473 JsonPartialWildCardMatcher With DateTime Regex Stopped Matching (Regression?) [bug]
 
 The full release notes can be found here: https://github.com/wiremock/WireMock.Net/blob/master/CHANGELOG.md

examples-Aspire/AspireApp1.AppHost/AspireApp1.AppHost.csproj

@@ -18,7 +18,10 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Aspire.Hosting.AppHost" Version="13.4.0" />
+        <PackageReference Include="Aspire.Hosting.AppHost" Version="13.4.3" />
+
+        <!-- CVE-2026-48109 -->
+        <PackageReference Include="MessagePack" Version="2.5.302" />
     </ItemGroup>
 
     <ItemGroup>

examples-Aspire/AspireApp1.AppHostOriginal/AspireApp1.AppHostOriginal.csproj

@@ -15,7 +15,10 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Aspire.Hosting.AppHost" Version="13.4.0" />
+        <PackageReference Include="Aspire.Hosting.AppHost" Version="13.4.3" />
+
+        <!-- CVE-2026-48109 -->
+        <PackageReference Include="MessagePack" Version="2.5.302" />
     </ItemGroup>
 
 </Project>

examples/WireMock.Net.Console.GrpcClient/WireMock.Net.Console.GrpcClient.csproj

@@ -9,9 +9,9 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Google.Protobuf" Version="3.25.1" />
+        <PackageReference Include="Google.Protobuf" Version="3.33.5" />
-        <PackageReference Include="Grpc.Net.Client" Version="2.60.0" />
+        <PackageReference Include="Grpc.Net.Client" Version="2.76.0" />
-        <PackageReference Include="Grpc.Tools" Version="2.60.0">
+        <PackageReference Include="Grpc.Tools" Version="2.78.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

examples/WireMock.Net.Console.NET8/Program.cs

@@ -1,8 +1,6 @@
 // Copyright © WireMock.Net
 
-using System.IO;
 using System.Reflection;
-using System.Threading.Tasks;
 using log4net;
 using log4net.Config;
 using log4net.Repository;
@@ -12,7 +10,7 @@ namespace WireMock.Net.Console.NET8;
 
 static class Program
 {
-    private static readonly ILoggerRepository LogRepository = LogManager.GetRepository(Assembly.GetEntryAssembly());
+    private static readonly ILoggerRepository LogRepository = LogManager.GetRepository(Assembly.GetEntryAssembly()!);
     private static readonly ILog Log = LogManager.GetLogger(typeof(Program));
 
     static async Task Main(params string[] args)

examples/WireMock.Net.ConsoleApp.UsingNuGet/WireMock.Net.ConsoleApp.UsingNuGet.csproj

@@ -16,7 +16,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="WireMock.Net" Version="2.6.0" />
+    <PackageReference Include="WireMock.Net" Version="2.10.0" />
   </ItemGroup>
 
 </Project>

examples/WireMock.Net.Service/WireMock.Net.Service.csproj

@@ -97,7 +97,7 @@
       <Version>2.3.9</Version>
     </PackageReference>
     <PackageReference Include="WireMock.Net">
-      <Version>1.25.0</Version>
+      <Version>2.10.0</Version>
     </PackageReference>
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />

examples/WireMock.Net.WebApplication.IIS/WireMock.Net.WebApplication.IIS.csproj

@@ -11,7 +11,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="8.0.0" />
+        <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="8.0.1" />
     </ItemGroup>
 
     <ItemGroup>

examples/WireMock.Net.WebApplication.IIS/WireMockService.cs

@@ -70,7 +70,7 @@ public class WireMockService : IWireMockService
 
         _server = WireMockServer.Start(_settings);
 
-        _logger.LogInformation($"WireMock.Net server settings {JsonConvert.SerializeObject(_settings)}");
+        _logger.LogInformation("WireMock.Net server settings {Settings}", JsonConvert.SerializeObject(_settings));
     }
 
     public void Stop()

src/WireMock.Net.Abstractions/WireMock.Net.Abstractions.csproj

@@ -39,7 +39,7 @@
     </ItemGroup>-->
 
     <ItemGroup>
-        <PackageReference Include="FluentBuilder" Version="0.14.0">
+        <PackageReference Include="FluentBuilder" Version="0.15.0">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>

src/WireMock.Net.Aspire/WireMock.Net.Aspire.csproj

@@ -45,7 +45,10 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Aspire.Hosting" Version="13.4.0" />
+        <PackageReference Include="Aspire.Hosting" Version="13.4.3" />
+
+        <!-- CVE-2026-48109 -->
+        <PackageReference Include="MessagePack" Version="2.5.302" />
     </ItemGroup>
 
     <ItemGroup>

src/WireMock.Net.MimePart/WireMock.Net.MimePart.csproj

@@ -36,7 +36,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
     </ItemGroup>
 
     <ItemGroup Condition="'$(Configuration)' == 'Debug'">

src/WireMock.Net.NUnit/WireMock.Net.NUnit.csproj

@@ -27,7 +27,7 @@
     <ItemGroup>
         <PackageReference Include="JsonConverter.Newtonsoft.Json" Version="0.13.0" />
         <PackageReference Include="NUnit" Version="4.4.0" />
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
     </ItemGroup>
 
     <ItemGroup>

src/WireMock.Net.OpenApiParser/WireMock.Net.OpenApiParser.csproj

@@ -43,7 +43,7 @@
         <PackageReference Include="RamlToOpenApiConverter.SourceOnly" Version="0.11.0" />
         <PackageReference Include="YamlDotNet" Version="16.3.0" />
         <PackageReference Include="RandomDataGenerator.Net" Version="1.0.19.1" />
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
     </ItemGroup>
 
     <ItemGroup Condition="'$(Configuration)' == 'Debug'">

src/WireMock.Net.RestClient/WireMock.Net.RestClient.csproj

@@ -35,7 +35,7 @@
     <ItemGroup>
         <PackageReference Include="JsonConverter.Newtonsoft.Json" Version="0.13.0" />
         <PackageReference Include="RestEase" Version="1.6.4" />
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
     </ItemGroup>
 
     <ItemGroup>

src/WireMock.Net.Shared/Settings/WireMockServerSettings.cs

@@ -305,12 +305,6 @@ public class WireMockServerSettings
     [PublicAPI, JsonIgnore]
     public IDictionary<string, Func<MatcherModel, IMatcher>>? CustomMatcherMappings { get; set; }
 
-    /// <summary>
-    /// The <see cref="JsonSerializerSettings"/> used when the JSON response is generated.
-    /// </summary>
-    [PublicAPI, JsonIgnore]
-    public JsonSerializerSettings? JsonSerializerSettings { get; set; }
-
     /// <summary>
     /// The Culture to use.
     /// Currently used for:
@@ -363,6 +357,7 @@ public class WireMockServerSettings
     /// Default is <see cref="NewtonsoftJsonConverter"/>.
     /// </remarks>
     [PublicAPI]
+    [JsonConverter(typeof(WireMockSettingsJsonConverter))]
     public IJsonConverter DefaultJsonSerializer { get; set; }
 
     /// <summary>
@@ -373,7 +368,7 @@ public class WireMockServerSettings
     /// Default is <see cref="NewtonsoftJsonBodyTransformer"/>.
     /// </remarks>
     [PublicAPI]
-    [JsonIgnore]
+    [JsonConverter(typeof(WireMockSettingsJsonConverter))]
     public IJsonBodyTransformer DefaultJsonBodyTransformer { get; set; }
 
     /// <summary>

src/WireMock.Net.Shared/Settings/WireMockSettingsJsonConverter.cs

@@ -0,0 +1,151 @@
+// Copyright © WireMock.Net
+
+using System.Reflection;
+using JsonConverter.Abstractions;
+using JsonConverter.Newtonsoft.Json;
+using JsonConverter.System.Text.Json;
+using Newtonsoft.Json;
+using WireMock.Transformers;
+using NewtonsoftJsonConverterBase = Newtonsoft.Json.JsonConverter;
+
+namespace WireMock.Settings;
+
+/// <summary>
+/// WireMockSettingsJsonConverter serializes and deserializes the special interface-based settings properties as type names.
+/// </summary>
+public class WireMockSettingsJsonConverter : NewtonsoftJsonConverterBase
+{
+    /// <inheritdoc />
+    public override bool CanConvert(Type objectType)
+    {
+        return typeof(IJsonConverter).IsAssignableFrom(objectType) || typeof(IJsonBodyTransformer).IsAssignableFrom(objectType);
+    }
+
+    /// <inheritdoc />
+    public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
+    {
+        writer.WriteValue(value?.GetType().FullName);
+    }
+
+    /// <inheritdoc />
+    public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
+    {
+        if (reader.TokenType == JsonToken.Null)
+        {
+            return existingValue ?? CreateDefaultValue(objectType);
+        }
+
+        if (reader.TokenType != JsonToken.String)
+        {
+            reader.Skip();
+            return existingValue ?? CreateDefaultValue(objectType);
+        }
+
+        var typeName = reader.Value as string;
+
+        if (typeof(IJsonConverter).IsAssignableFrom(objectType))
+        {
+            return CreateJsonConverter(typeName) ?? existingValue ?? new NewtonsoftJsonConverter();
+        }
+
+        if (typeof(IJsonBodyTransformer).IsAssignableFrom(objectType))
+        {
+            var settings = ExtractSettings(existingValue as IJsonBodyTransformer);
+            return settings != null
+                ? CreateJsonBodyTransformer(typeName, settings) ?? existingValue ?? new NewtonsoftJsonBodyTransformer(settings)
+                : existingValue;
+        }
+
+        return existingValue;
+    }
+
+    private static object? CreateDefaultValue(Type objectType)
+    {
+        if (typeof(IJsonConverter).IsAssignableFrom(objectType))
+        {
+            return new NewtonsoftJsonConverter();
+        }
+
+        return null;
+    }
+
+    private static IJsonConverter? CreateJsonConverter(string? typeName)
+    {
+        if (string.IsNullOrWhiteSpace(typeName))
+        {
+            return null;
+        }
+
+        if (typeName == nameof(NewtonsoftJsonConverter) || typeName == typeof(NewtonsoftJsonConverter).FullName)
+        {
+            return new NewtonsoftJsonConverter();
+        }
+
+        if (typeName == nameof(SystemTextJsonConverter) || typeName == typeof(SystemTextJsonConverter).FullName)
+        {
+            return new SystemTextJsonConverter();
+        }
+
+        var type = GetType(typeName);
+        if (type == null || !typeof(IJsonConverter).IsAssignableFrom(type))
+        {
+            return null;
+        }
+
+        return Activator.CreateInstance(type) as IJsonConverter;
+    }
+
+    private static IJsonBodyTransformer? CreateJsonBodyTransformer(string? typeName, WireMockServerSettings settings)
+    {
+        if (string.IsNullOrWhiteSpace(typeName))
+        {
+            return null;
+        }
+
+        if (typeName == nameof(NewtonsoftJsonBodyTransformer) || typeName == typeof(NewtonsoftJsonBodyTransformer).FullName)
+        {
+            return new NewtonsoftJsonBodyTransformer(settings);
+        }
+
+        if (typeName == nameof(SystemTextJsonBodyTransformer) || typeName == typeof(SystemTextJsonBodyTransformer).FullName)
+        {
+            return new SystemTextJsonBodyTransformer(settings);
+        }
+
+        var type = GetType(typeName);
+        if (type == null || !typeof(IJsonBodyTransformer).IsAssignableFrom(type))
+        {
+            return null;
+        }
+
+        var constructorWithSettings = type.GetConstructor([typeof(WireMockServerSettings)]);
+        if (constructorWithSettings != null)
+        {
+            return constructorWithSettings.Invoke([settings]) as IJsonBodyTransformer;
+        }
+
+        return Activator.CreateInstance(type) as IJsonBodyTransformer;
+    }
+
+    private static WireMockServerSettings? ExtractSettings(IJsonBodyTransformer? existingValue)
+    {
+        if (existingValue == null)
+        {
+            return null;
+        }
+
+        return existingValue.GetType()
+            .GetFields(BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public)
+            .Where(field => typeof(WireMockServerSettings).IsAssignableFrom(field.FieldType))
+            .Select(field => field.GetValue(existingValue) as WireMockServerSettings)
+            .FirstOrDefault(settings => settings != null);
+    }
+
+    private static Type? GetType(string typeName)
+    {
+        return Type.GetType(typeName, throwOnError: false) ??
+               AppDomain.CurrentDomain.GetAssemblies()
+                   .Select(assembly => assembly.GetType(typeName, throwOnError: false))
+                   .FirstOrDefault(foundType => foundType != null);
+    }
+}

src/WireMock.Net.Shared/Util/BodyParser.cs

@@ -5,6 +5,7 @@ using System.Text;
 using Stef.Validation;
 using WireMock.Constants;
 using WireMock.Matchers;
+using WireMock.Serialization;
 using WireMock.Types;
 
 namespace WireMock.Util;
@@ -25,7 +26,7 @@ internal static class BodyParser
         CONNECT - No defined body semantics
         PATCH - Body supported.
     */
-    private static readonly IDictionary<string, bool> BodyAllowedForMethods = new Dictionary<string, bool>
+    private static readonly Dictionary<string, bool> BodyAllowedForMethods = new()
     {
         { HttpRequestMethod.HEAD, false },
         { HttpRequestMethod.GET, false },
@@ -173,7 +174,7 @@ internal static class BodyParser
             {
                 try
                 {
-                    data.BodyAsJson = settings.DefaultJsonConverter.Deserialize<object>(data.BodyAsString);
+                    data.BodyAsJson = settings.DefaultJsonConverter.Deserialize<object>(data.BodyAsString, JsonSerializationConstants.JsonConverterOptionsWithDateParsingNone);
                     data.DetectedBodyType = BodyType.Json;
                 }
                 catch

src/WireMock.Net.Shared/WireMock.Net.Shared.csproj

@@ -27,7 +27,7 @@
 
     <ItemGroup>
         <PackageReference Include="Microsoft.AspNetCore.Http" Version="2.3.9" />
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
         <PackageReference Include="AnyOf" Version="0.5.0.1" />
         <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.2" />
         <PackageReference Include="JsonConverter.Newtonsoft.Json" Version="0.13.0" />

src/WireMock.Net.TUnit/WireMock.Net.TUnit.csproj

@@ -27,7 +27,7 @@
 
     <ItemGroup>
         <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
         <PackageReference Include="TUnit.Core" Version="1.17.29" />
     </ItemGroup>
 

src/WireMock.Net.Testcontainers/WireMock.Net.Testcontainers.csproj

@@ -38,7 +38,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
         <PackageReference Include="Testcontainers" Version="4.12.0" />
     </ItemGroup>
 

src/WireMock.Net.xUnit.v3/WireMock.Net.xUnit.v3.csproj

@@ -23,7 +23,7 @@
 
     <ItemGroup>
         <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
         <PackageReference Include="xunit.v3.extensibility.core" Version="3.2.2" />
     </ItemGroup>
 

src/WireMock.Net.xUnit/WireMock.Net.xUnit.csproj

@@ -26,7 +26,7 @@
 
     <ItemGroup>
         <PackageReference Include="Newtonsoft.Json" Version="13.0.4" />
-        <PackageReference Include="Stef.Validation" Version="0.2.0" />
+        <PackageReference Include="Stef.Validation" Version="0.3.0" />
         <PackageReference Include="xUnit.abstractions" Version="2.0.3" />
     </ItemGroup>
 

src/dotnet-WireMock.Net/Program.cs

@@ -1,7 +1,5 @@
 // Copyright © WireMock.Net
 
-using System;
-using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
 using WireMock.Logging;
 using WireMock.Net.StandAlone;

test/WireMock.Net.Aspire.TestAppHost/WireMock.Net.Aspire.TestAppHost.csproj

@@ -19,7 +19,10 @@
     </ItemGroup>
 
     <ItemGroup>
-        <PackageReference Include="Aspire.Hosting.AppHost" Version="13.4.0" />
+        <PackageReference Include="Aspire.Hosting.AppHost" Version="13.4.3" />
+
+        <!-- CVE-2026-48109 -->
+        <PackageReference Include="MessagePack" Version="2.5.302" />
     </ItemGroup>
 
     <ItemGroup>

test/WireMock.Net.Aspire.Tests/WireMock.Net.Aspire.Tests.csproj

@@ -14,7 +14,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Aspire.Hosting.Testing" Version="13.4.0" />
+        <PackageReference Include="Aspire.Hosting.Testing" Version="13.4.3" />
         <PackageReference Include="Codecov" Version="1.13.0" />
         <PackageReference Include="coverlet.msbuild" Version="6.0.4">
             <PrivateAssets>all</PrivateAssets>
@@ -32,6 +32,9 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
+
+        <!-- CVE-2026-48109 -->
+        <PackageReference Include="MessagePack" Version="2.5.302" />
     </ItemGroup>
 
     <ItemGroup>

test/WireMock.Net.Extensions.Routing.Tests/WireMock.Net.Extensions.Routing.Tests.csproj

@@ -16,7 +16,7 @@
 
     <ItemGroup>
         <PackageReference Include="AwesomeAssertions" Version="9.4.0" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
         <PackageReference Include="coverlet.collector" Version="6.0.4">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

test/WireMock.Net.Middleware.Tests/WireMock.Net.Middleware.Tests.csproj

@@ -24,7 +24,7 @@
         </PackageReference>
         <PackageReference Include="AwesomeAssertions" Version="9.4.0" />
         <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="8.0.8" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
         <PackageReference Include="Moq" Version="4.20.72" />
         <PackageReference Include="xunit.v3" Version="3.2.2" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">

test/WireMock.Net.Tests.UsingNuGet/WireMock.Net.Tests.UsingNuGet.csproj

@@ -16,7 +16,7 @@
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
-        <PackageReference Include="WireMock.Net" Version="2.9.0" />
+        <PackageReference Include="WireMock.Net" Version="2.10.0" />
         <PackageReference Include="xunit.v3" Version="3.2.2" />
         <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
             <PrivateAssets>all</PrivateAssets>

test/WireMock.Net.Tests/Matchers/JsonPartialWildcardMatcherTests.cs

@@ -416,4 +416,20 @@ public class JsonPartialWildcardMatcherTests
         // Assert 
         Assert.Equal(1.0, match);
     }
+
+    [Fact]
+    public void JsonPartialWildcardMatcher_IsMatch_WithRegexTrue_DateFormat_ShouldMatch()
+    {
+        // Assign
+        var matcher = new JsonPartialWildcardMatcher(
+            new { date = "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|[+-]\\d{2}:\\d{2})$", id = 1 },
+            ignoreCase: false,
+            regex: true);
+
+        // Act
+        var match = matcher.IsMatch("{\"date\":\"2026-06-09T22:23:18.53421+00:00\",\"id\":1}").Score;
+
+        // Assert
+        Assert.Equal(1.0, match);
+    }
 }

test/WireMock.Net.Tests/Matchers/SystemTextJsonPartialWildcardMatcherTests.cs

@@ -379,4 +379,20 @@ public class SystemTextJsonPartialWildcardMatcherTests
             // Assert
             Assert.Equal(1.0, match);
         }
-}
+
+        [Fact]
+        public void SystemTextJsonPartialWildcardMatcher_IsMatch_WithRegexTrue_DateFormat_ShouldMatch()
+        {
+            // Assign
+            var matcher = new SystemTextJsonPartialWildcardMatcher(
+                new { date = "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}(?:\\.\\d+)?(?:Z|[+-]\\d{2}:\\d{2})$", id = 1 },
+                ignoreCase: false,
+                regex: true);
+
+            // Act
+            var match = matcher.IsMatch("{\"date\":\"2026-06-09T22:23:18.53421+00:00\",\"id\":1}").Score;
+
+            // Assert
+            Assert.Equal(1.0, match);
+        }
+    }

test/WireMock.Net.Tests/Settings/WireMockServerSettingsJsonTests.cs

@@ -0,0 +1,82 @@
+// Copyright © WireMock.Net
+
+using JsonConverter.Newtonsoft.Json;
+using JsonConverter.System.Text.Json;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+using WireMock.Settings;
+using WireMock.Transformers;
+
+namespace WireMock.Net.Tests.Settings;
+
+public class WireMockServerSettingsJsonTests
+{
+    [Fact]
+    public void NewtonsoftJson_Serialize_WireMockServerSettings_HandlesSpecialProperties_AndKeepsOtherPropertiesAsIs()
+    {
+        // Arrange
+        var settings = new WireMockServerSettings
+        {
+            Port = 1234,
+            AdminPath = "/custom-admin",
+            StartAdminInterface = true,
+            DefaultJsonSerializer = new SystemTextJsonConverter()
+        };
+        settings.DefaultJsonBodyTransformer = new SystemTextJsonBodyTransformer(settings);
+
+        // Act
+        var json = JsonConvert.SerializeObject(settings);
+        var jsonObject = JObject.Parse(json);
+
+        // Assert
+        jsonObject[nameof(WireMockServerSettings.Port)]!.Value<int>().Should().Be(1234);
+        jsonObject[nameof(WireMockServerSettings.AdminPath)]!.Value<string>().Should().Be("/custom-admin");
+        jsonObject[nameof(WireMockServerSettings.StartAdminInterface)]!.Value<bool>().Should().BeTrue();
+        jsonObject[nameof(WireMockServerSettings.DefaultJsonSerializer)]!.Type.Should().Be(JTokenType.String);
+        jsonObject[nameof(WireMockServerSettings.DefaultJsonSerializer)]!.Value<string>().Should().Be(typeof(SystemTextJsonConverter).FullName);
+        jsonObject[nameof(WireMockServerSettings.DefaultJsonBodyTransformer)]!.Type.Should().Be(JTokenType.String);
+        jsonObject[nameof(WireMockServerSettings.DefaultJsonBodyTransformer)]!.Value<string>().Should().Be(typeof(SystemTextJsonBodyTransformer).FullName);
+    }
+
+    [Fact]
+    public void NewtonsoftJson_Deserialize_WireMockServerSettings_HandlesSpecialProperties_AndKeepsOtherPropertiesAsIs()
+    {
+        // Arrange
+        var json =
+            $"{{\"{nameof(WireMockServerSettings.Port)}\":4321," +
+            $"\"{nameof(WireMockServerSettings.AdminPath)}\":\"/custom-admin\"," +
+            $"\"{nameof(WireMockServerSettings.StartAdminInterface)}\":true," +
+            $"\"{nameof(WireMockServerSettings.DefaultJsonSerializer)}\":\"{typeof(SystemTextJsonConverter).FullName}\"," +
+            $"\"{nameof(WireMockServerSettings.DefaultJsonBodyTransformer)}\":\"{typeof(SystemTextJsonBodyTransformer).FullName}\"}}";
+
+        // Act
+        var settings = JsonConvert.DeserializeObject<WireMockServerSettings>(json);
+
+        // Assert
+        settings.Should().NotBeNull();
+        settings!.Port.Should().Be(4321);
+        settings.AdminPath.Should().Be("/custom-admin");
+        settings.StartAdminInterface.Should().BeTrue();
+        settings.DefaultJsonSerializer.Should().BeOfType<SystemTextJsonConverter>();
+        settings.DefaultJsonBodyTransformer.Should().BeOfType<SystemTextJsonBodyTransformer>();
+    }
+
+    [Fact]
+    public void NewtonsoftJson_Deserialize_WireMockServerSettings_LegacyObjects_AreIgnored_AndOtherPropertiesStayUntouched()
+    {
+        // Arrange
+        var json =
+            $"{{\"{nameof(WireMockServerSettings.Port)}\":9876," +
+            $"\"{nameof(WireMockServerSettings.DefaultJsonSerializer)}\":{{}}," +
+            $"\"{nameof(WireMockServerSettings.DefaultJsonBodyTransformer)}\":{{}}}}";
+
+        // Act
+        var settings = JsonConvert.DeserializeObject<WireMockServerSettings>(json);
+
+        // Assert
+        settings.Should().NotBeNull();
+        settings!.Port.Should().Be(9876);
+        settings.DefaultJsonSerializer.Should().BeOfType<NewtonsoftJsonConverter>();
+        settings.DefaultJsonBodyTransformer.Should().BeOfType<NewtonsoftJsonBodyTransformer>();
+    }
+}

test/WireMock.Net.Tests/WireMock.Net.Tests.csproj

@@ -69,7 +69,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
         <PackageReference Include="coverlet.collector" Version="6.0.4">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

test/WireMock.Net.Tests/WireMockServerTests.WithBody.cs

@@ -53,6 +53,81 @@ public partial class WireMockServerTests
         response.Should().BeEquivalentTo("{\"first_name\":\"John\",\"last_name\":\"Smith\"}");
     }
 
+    [Fact]
+    public async Task WireMockServer_WithBodyAsJson_WithJsonPartialWildcardMatcher()
+    {
+        // Arrange
+        using var server = WireMockServer.Start(new WireMockServerSettings
+        {
+            Logger = new TestOutputHelperWireMockLogger(testOutputHelper)
+        });
+        server
+            .Given(
+                Request.Create()
+                    .WithPath("/test")
+                    .UsingPost()
+                    .WithBody(new JsonPartialWildcardMatcher(
+                        new
+                        {
+                            date = @"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d+)?(?:Z|[+-]\d{2}:\d{2})$",
+                            id = 1
+                        },
+                        ignoreCase: true,
+                        regex: true
+                    )
+                )
+            )
+            .RespondWith(Response.Create().WithStatusCode(200).WithBody("matched"));
+
+        // Act
+        var requestUri = new Uri($"http://localhost:{server.Port}/test");
+
+        var response = await server.CreateClient().PostAsync(requestUri, new StringContent("{\"date\":\"2026-06-09T22:23:18.53421+00:00\",\"id\":1}"), _ct);
+
+        // Assert
+        response.StatusCode.Should().Be(HttpStatusCode.OK);
+
+        server.Stop();
+    }
+
+    [Fact]
+    public async Task WireMockServer_WithBodyAsJson_WithSystemTextJsonPartialWildcardMatcher()
+    {
+        // Arrange
+        using var server = WireMockServer.Start(new WireMockServerSettings
+        {
+            Logger = new TestOutputHelperWireMockLogger(testOutputHelper),
+            DefaultJsonSerializer = new SystemTextJsonConverter()
+        });
+        server
+            .Given(
+                Request.Create()
+                    .WithPath("/test")
+                    .UsingPost()
+                    .WithBody(new SystemTextJsonPartialWildcardMatcher(
+                        new
+                        {
+                            date = @"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(?:\.\d+)?(?:Z|[+-]\d{2}:\d{2})$",
+                            id = 1
+                        },
+                        ignoreCase: true,
+                        regex: true
+                    )
+                )
+            )
+            .RespondWith(Response.Create().WithStatusCode(200).WithBody("matched"));
+
+        // Act
+        var requestUri = new Uri($"http://localhost:{server.Port}/test");
+
+        var response = await server.CreateClient().PostAsync(requestUri, new StringContent("{\"date\":\"2026-06-09T22:23:18.53421+00:00\",\"id\":1}"), _ct);
+
+        // Assert
+        response.StatusCode.Should().Be(HttpStatusCode.OK);
+
+        server.Stop();
+    }
+
     [Fact]
     public async Task WireMockServer_WithBodyAsJson_Using_PostAsJsonAsync_And_MultipleJmesPathMatchers_ShouldMatch()
     {