diff --git a/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.Designer.cs b/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.Designer.cs
index beb6af7..c9d723c 100644
--- a/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.Designer.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.Designer.cs
@@ -258,14 +258,5 @@ namespace WelsonJS.Launcher.Properties {
                 return ResourceManager.GetString("WhoisServerUrl", resourceCulture);
             }
         }
-        
-        /// <summary>
-        ///   Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.3124.77과(와) 유사한 지역화된 문자열을 찾습니다.
-        /// </summary>
-        internal static string WhoisUserAgent {
-            get {
-                return ResourceManager.GetString("WhoisUserAgent", resourceCulture);
-            }
-        }
     }
 }
diff --git a/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.resx b/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.resx
index fc3f436..311ac5c 100644
--- a/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.resx
+++ b/WelsonJS.Toolkit/WelsonJS.Launcher/Properties/Resources.resx
@@ -178,9 +178,6 @@
   <data name="WhoisServerUrl" xml:space="preserve">
     <value>https://xn--c79as89aj0e29b77z.xn--3e0b707e/kor/whois.jsc</value>
   </data>
-  <data name="WhoisUserAgent" xml:space="preserve">
-    <value>Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.3124.77</value>
-  </data>
   <data name="BlobServerPrefix" xml:space="preserve">
     <value>https://catswords.blob.core.windows.net/welsonjs/</value>
   </data>
diff --git a/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceServer.cs b/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceServer.cs
index 17ac918..c9a533c 100644
--- a/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceServer.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceServer.cs
@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Net;
 using System.Net.Http;
 using System.Reflection;
@@ -9,7 +8,6 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Forms;
-using System.Xml.Linq;
 
 namespace WelsonJS.Launcher
 {
@@ -132,8 +130,10 @@ namespace WelsonJS.Launcher
 
                     string blobServerPrefix = Program.GetAppConfig("BlobServerPrefix");
                     string url = $"{blobServerPrefix}{path}";
+                    string userAgent = Program.GetAppConfig("DefaultUserAgent");
 
                     HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, url);
+                    request.Headers.UserAgent.ParseAdd(context.Request.UserAgent);
                     HttpResponseMessage response = await client.SendAsync(request);
 
                     if (!response.IsSuccessStatusCode)
diff --git a/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceTools/Whois.cs b/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceTools/Whois.cs
index b748c48..7efe928 100644
--- a/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceTools/Whois.cs
+++ b/WelsonJS.Toolkit/WelsonJS.Launcher/ResourceTools/Whois.cs
@@ -44,7 +44,7 @@ namespace WelsonJS.Launcher.ResourceTools
                 };
 
                 request.Headers.Add("Accept", "*/*");
-                request.Headers.Add("User-Agent", Program.GetAppConfig("WhoisUserAgent"));
+                request.Headers.Add("User-Agent", context.Request.UserAgent);
                 client.DefaultRequestHeaders.Referrer = new Uri(Program.GetAppConfig("WhoisReferrerUrl"));
 
                 try
diff --git a/WelsonJS.Toolkit/WelsonJS.Launcher/app.config b/WelsonJS.Toolkit/WelsonJS.Launcher/app.config
index 812f990..2e92fd9 100644
--- a/WelsonJS.Toolkit/WelsonJS.Launcher/app.config
+++ b/WelsonJS.Toolkit/WelsonJS.Launcher/app.config
@@ -9,7 +9,6 @@
     <add key="AzureAiServiceApiKey" value=""/>
     <add key="WhoisServerUrl" value="https://xn--c79as89aj0e29b77z.xn--3e0b707e/kor/whois.jsc"/>
     <add key="WhoisReferrerUrl" value="https://xn--c79as89aj0e29b77z.xn--3e0b707e/kor/whois/whois.jsp"/>
-    <add key="WhoisUserAgent" value="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36 Edg/134.0.3124.77"/>
     <add key="WhoisClientAddress" value="141.101.82.1"/>
     <add key="DnsServerAddress" value="1.1.1.1"/>
     <add key="BlobServerPrefix" value="https://catswords.blob.core.windows.net/welsonjs/"/>