diff --git a/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix.csproj b/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix.csproj
index 814c2ac..6d9171c 100644
--- a/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix.csproj
+++ b/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix.csproj
@@ -53,7 +53,8 @@ SPDX-License-Identifier: MIT
 
   <!-- disables code style/code analysis warnings configured by Smdn.MSBuild.ProjectAssets.Library -->
   <PropertyGroup>
-    <NoWarn>IL2026;SA1005;SA1028;SA1110;SA1306;SA1309;SA1313;SA1505;SA1508;SA1513;SA1514;SA1518;SA1616;SA1623;SA1629;SA1642;SA1649;$(NoWarn)</NoWarn>
+    <NoWarn>SA1005;SA1028;SA1110;SA1306;SA1309;SA1313;$(NoWarn)</NoWarn>
+    <NoWarn>SA1505;SA1508;SA1513;SA1514;SA1518;SA1616;SA1623;SA1629;SA1642;SA1649;$(NoWarn)</NoWarn>
   </PropertyGroup>
 
   <Target Name="GenerateReadmeFileContent">
diff --git a/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix/JsonSerializerSourceGenerationContext.cs b/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix/JsonSerializerSourceGenerationContext.cs
new file mode 100644
index 0000000..d038739
--- /dev/null
+++ b/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix/JsonSerializerSourceGenerationContext.cs
@@ -0,0 +1,11 @@
+// SPDX-FileCopyrightText: 2024 smdn <smdn@smdn.jp>
+// SPDX-License-Identifier: MIT
+using System.Text.Json.Serialization;
+
+namespace Smdn.Net.EchonetLite.Appendix;
+
+// use source generation in System.Text.Json
+// ref: https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/source-generation
+[JsonSerializable(typeof(SpecificationMaster.SpecificationMasterJsonObject))]
+[JsonSerializable(typeof(PropertyMaster))]
+internal partial class JsonSerializerSourceGenerationContext : JsonSerializerContext { }
diff --git a/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix/SpecificationMaster.cs b/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix/SpecificationMaster.cs
index 5902652..a6c41d6 100644
--- a/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix/SpecificationMaster.cs
+++ b/src/Smdn.Net.EchonetLite.Appendix/Smdn.Net.EchonetLite.Appendix/SpecificationMaster.cs
@@ -20,7 +20,7 @@ internal sealed class SpecificationMaster {
   /// <summary>
   /// JSONデシリアライズ用のオブジェクト
   /// </summary>
-  private sealed class SpecificationMasterJsonObject {
+  internal sealed class SpecificationMasterJsonObject {
     /// <summary>
     /// ECHONET Lite SPECIFICATIONのバージョン
     /// </summary>
@@ -126,7 +126,10 @@ public static SpecificationMaster GetInstance()
       using var stream = GetSpecificationMasterDataStream(specificationMasterJsonFileName);
 
       _Instance = new(
-        JsonSerializer.Deserialize<SpecificationMasterJsonObject>(stream) ?? throw new InvalidOperationException($"failed to deserialize {specificationMasterJsonFileName}")
+        JsonSerializer.Deserialize<SpecificationMasterJsonObject>(
+          stream,
+          JsonSerializerSourceGenerationContext.Default.SpecificationMasterJsonObject
+        ) ?? throw new InvalidOperationException($"failed to deserialize {specificationMasterJsonFileName}")
       );
     }
 
@@ -173,7 +176,10 @@ byte classCode
 
     // スーパークラスのプロパティを列挙
     using (var stream = GetSpecificationMasterDataStream($"{classGroupSpec.SuperClassName}.json")) {
-      var superClassProperties = JsonSerializer.Deserialize<PropertyMaster>(stream) ?? throw new InvalidOperationException($"{nameof(PropertyMaster)} can not be null");
+      var superClassProperties = JsonSerializer.Deserialize<PropertyMaster>(
+        stream,
+        JsonSerializerSourceGenerationContext.Default.PropertyMaster
+      ) ?? throw new InvalidOperationException($"{nameof(PropertyMaster)} can not be null");
       properties.AddRange(superClassProperties.Properties);
     }
 
@@ -187,7 +193,11 @@ byte classCode
       // クラスのプロパティを列挙
       using (var stream = GetSpecificationMasterDataStream(classGroupDirectoryName, classFileName)) {
         if (stream is not null) {
-          var classProperties = JsonSerializer.Deserialize<PropertyMaster>(stream) ?? throw new InvalidOperationException($"{nameof(PropertyMaster)} can not be null");
+          var classProperties = JsonSerializer.Deserialize<PropertyMaster>(
+            stream,
+            JsonSerializerSourceGenerationContext.Default.PropertyMaster
+          ) ?? throw new InvalidOperationException($"{nameof(PropertyMaster)} can not be null");
+
           properties.AddRange(classProperties.Properties);
         }
       }
diff --git a/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite.Serialization.Json/JsonSerializerSourceGenerationContext.cs b/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite.Serialization.Json/JsonSerializerSourceGenerationContext.cs
new file mode 100644
index 0000000..794f0a1
--- /dev/null
+++ b/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite.Serialization.Json/JsonSerializerSourceGenerationContext.cs
@@ -0,0 +1,12 @@
+// SPDX-FileCopyrightText: 2024 smdn <smdn@smdn.jp>
+// SPDX-License-Identifier: MIT
+using System.Text.Json.Serialization;
+
+using Smdn.Net.EchonetLite.Protocol;
+
+namespace Smdn.Net.EchonetLite.Serialization.Json;
+
+// use source generation in System.Text.Json
+// ref: https://learn.microsoft.com/en-us/dotnet/standard/serialization/system-text-json/source-generation
+[JsonSerializable(typeof(Frame))]
+internal partial class JsonSerializerSourceGenerationContext : JsonSerializerContext { }
diff --git a/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite.csproj b/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite.csproj
index 620bbc0..92900ac 100644
--- a/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite.csproj
+++ b/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite.csproj
@@ -38,7 +38,10 @@ SPDX-License-Identifier: MIT
 
   <!-- disables code style/code analysis warnings configured by Smdn.MSBuild.ProjectAssets.Library -->
   <PropertyGroup>
-    <NoWarn>CS3001;CS3003;CS3005;IL2026;SA1000;SA1001;SA1004;SA1005;SA1024;SA1106;SA1110;SA1113;SA1122;SA1137;SA1208;SA1210;SA1309;SA1313;SA1316;SA1402;SA1413;SA1414;SA1505;SA1507;SA1508;SA1513;SA1514;SA1614;SA1623;SA1629;SA1642;$(NoWarn)</NoWarn>
+    <NoWarn>CS3001;CS3003;CS3005;$(NoWarn)</NoWarn>
+    <NoWarn>SA1000;SA1001;SA1004;SA1005;SA1024;SA1106;SA1110;SA1113;SA1122;SA1137;SA1208;SA1210;$(NoWarn)</NoWarn>
+    <NoWarn>SA1309;SA1313;SA1316;SA1402;SA1413;SA1414;$(NoWarn)</NoWarn>
+    <NoWarn>SA1505;SA1507;SA1508;SA1513;SA1514;SA1614;SA1623;SA1629;SA1642;$(NoWarn)</NoWarn>
   </PropertyGroup>
 
   <Target Name="GenerateReadmeFileContent">
diff --git a/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite/EchonetClient.LowerLayer.cs b/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite/EchonetClient.LowerLayer.cs
index c624f3d..919c719 100644
--- a/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite/EchonetClient.LowerLayer.cs
+++ b/src/Smdn.Net.EchonetLite/Smdn.Net.EchonetLite/EchonetClient.LowerLayer.cs
@@ -11,6 +11,7 @@
 using Microsoft.Extensions.Logging;
 
 using Smdn.Net.EchonetLite.Protocol;
+using Smdn.Net.EchonetLite.Serialization.Json;
 
 namespace Smdn.Net.EchonetLite;
 
@@ -65,7 +66,7 @@ private void EchonetDataReceived(object? sender, (IPAddress address, ReadOnlyMem
       // ECHONETLiteフレームではないため無視
       return;
 
-    _logger?.LogTrace($"Echonet Lite Frame受信: address:{value.address}\r\n,{JsonSerializer.Serialize(frame)}");
+    _logger?.LogTrace($"Echonet Lite Frame受信: address:{value.address}\r\n,{JsonSerializer.Serialize(frame, JsonSerializerSourceGenerationContext.Default.Frame)}");
 
     FrameReceived?.Invoke(this, (value.address, frame));
   }
@@ -92,7 +93,7 @@ private async ValueTask SendFrameAsync(IPAddress? address, Action<IBufferWriter<
 
       if (_logger is not null && _logger.IsEnabled(LogLevel.Trace)) {
         if (FrameSerializer.TryDeserialize(_requestFrameBuffer.WrittenSpan, out var frame)) {
-          _logger.LogTrace($"Echonet Lite Frame送信: address:{address}\r\n,{JsonSerializer.Serialize(frame)}");
+          _logger.LogTrace($"Echonet Lite Frame送信: address:{address}\r\n,{JsonSerializer.Serialize(frame, JsonSerializerSourceGenerationContext.Default.Frame)}");
         }
 #if DEBUG
         else {