diff --git a/SimpleVoiceroid2Proxy/Server/Controller.cs b/SimpleVoiceroid2Proxy/Server/Controller.cs
index e71268e..93d4fe0 100644
--- a/SimpleVoiceroid2Proxy/Server/Controller.cs
+++ b/SimpleVoiceroid2Proxy/Server/Controller.cs
@@ -1,8 +1,11 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Net;
+using System.Linq;
 using System.Text.Json;
 using System.Threading.Tasks;
+using System.Web;
 
 namespace SimpleVoiceroid2Proxy.Server;
 
@@ -47,13 +50,26 @@ public async Task HandleAsync(HttpContext context)
 
     private async Task HandleGetTalkAsync(HttpContext context)
     {
-        await HandleTalkAsync(context, context.Query["text"]);
+        await HandleTalkAsync(context, context.Query.GetValues("text")?.FirstOrDefault());
     }
 
     private async Task HandlePostTalkAsync(HttpContext context)
     {
-        var payload = await JsonSerializer.DeserializeAsync<Dictionary<string, object?>>(context.Request.InputStream);
-        await HandleTalkAsync(context, (string?)payload!["text"]);
+        string? text = null;
+        if (context.RequestMediaType == "application/x-www-form-urlencoded")
+        {
+            using var reader = new StreamReader(context.Request.InputStream);
+            var body = reader.ReadToEnd();
+            var form = HttpUtility.ParseQueryString(body);
+            text = form.GetValues("text")?.FirstOrDefault();
+        }
+        else
+        {
+            var payload = await JsonSerializer.DeserializeAsync<Dictionary<string, JsonElement>>(context.Request.InputStream);
+            text = payload!["text"].GetString();
+        }
+
+        await HandleTalkAsync(context, text);
     }
 
     private async Task HandleTalkAsync(HttpContext context, string? text)
diff --git a/SimpleVoiceroid2Proxy/Server/HttpContext.cs b/SimpleVoiceroid2Proxy/Server/HttpContext.cs
index 8f3b4ef..26ba0ca 100644
--- a/SimpleVoiceroid2Proxy/Server/HttpContext.cs
+++ b/SimpleVoiceroid2Proxy/Server/HttpContext.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Collections.Specialized;
 using System.Net;
+using System.Net.Http.Headers;
 using System.Text;
 using System.Text.Json;
 using System.Threading.Tasks;
@@ -14,6 +15,14 @@ public sealed class HttpContext(HttpListenerContext Context) : IDisposable
     public HttpListenerRequest Request => Context.Request;
     public HttpListenerResponse Response => Context.Response;
     public NameValueCollection Query => HttpUtility.ParseQueryString(Request.Url.Query, Encoding.UTF8);
+    public string? RequestMediaType
+    {
+        get
+        {
+            MediaTypeHeaderValue.TryParse(Request.ContentType, out var value);
+            return value.MediaType;
+        }
+    }
 
     public async Task RespondJson(HttpStatusCode code, Dictionary<string, object?> payload)
     {
diff --git a/SimpleVoiceroid2Proxy/SimpleVoiceroid2Proxy.csproj b/SimpleVoiceroid2Proxy/SimpleVoiceroid2Proxy.csproj
index ee9e3e7..2382913 100644
--- a/SimpleVoiceroid2Proxy/SimpleVoiceroid2Proxy.csproj
+++ b/SimpleVoiceroid2Proxy/SimpleVoiceroid2Proxy.csproj
@@ -10,6 +10,7 @@
     <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
   </PropertyGroup>
   <ItemGroup>
+    <Reference Include="System.Net.Http" />
     <Reference Include="System.Web" />
     <PackageReference Include="Codeer.Friendly.Windows.Grasp" Version="2.14.2" />
     <PackageReference Include="RM.Friendly.WPFStandardControls" Version="1.59.1" />
diff --git a/SimpleVoiceroid2Proxy/packages.lock.json b/SimpleVoiceroid2Proxy/packages.lock.json
index 8027fb7..d535302 100644
--- a/SimpleVoiceroid2Proxy/packages.lock.json
+++ b/SimpleVoiceroid2Proxy/packages.lock.json
@@ -11,15 +11,6 @@
           "Codeer.Friendly.Windows": "2.17.0"
         }
       },
-      "Microsoft.NETFramework.ReferenceAssemblies": {
-        "type": "Direct",
-        "requested": "[1.0.3, )",
-        "resolved": "1.0.3",
-        "contentHash": "vUc9Npcs14QsyOD01tnv/m8sQUnGTGOw1BCmKcv77LBJY7OxhJ+zJF7UD/sCL3lYNFuqmQEVlkfS4Quif6FyYg==",
-        "dependencies": {
-          "Microsoft.NETFramework.ReferenceAssemblies.net481": "1.0.3"
-        }
-      },
       "RM.Friendly.WPFStandardControls": {
         "type": "Direct",
         "requested": "[1.59.1, )",
@@ -80,11 +71,6 @@
           "System.Threading.Tasks.Extensions": "4.5.4"
         }
       },
-      "Microsoft.NETFramework.ReferenceAssemblies.net481": {
-        "type": "Transitive",
-        "resolved": "1.0.3",
-        "contentHash": "Vv/20vgHS7VglVOVh8J3Iz/MA+VYKVRp9f7r2qiKBMuzviTOmocG70yq0Q8T5OTmCONkEAIJwETD1zhEfLkAXQ=="
-      },
       "System.Buffers": {
         "type": "Transitive",
         "resolved": "4.5.1",
@@ -133,6 +119,7 @@
         "resolved": "4.5.0",
         "contentHash": "okurQJO6NRE/apDIP23ajJ0hpiNmJ+f0BwOlB/cSqTLQlw5upkf+5+96+iG2Jw40G1fCVCyPz/FhIABUjMR+RQ=="
       }
-    }
+    },
+    ".NETFramework,Version=v4.8.1/win7-x86": {}
   }
 }
\ No newline at end of file