diff --git a/Source/GrasscutterTools/FormMain.cs b/Source/GrasscutterTools/FormMain.cs
index 07bfac0..b3a74f4 100644
--- a/Source/GrasscutterTools/FormMain.cs
+++ b/Source/GrasscutterTools/FormMain.cs
@@ -29,7 +29,11 @@ namespace GrasscutterTools
         {
             MultiLanguage.LoadLanguage(this, typeof(FormMain));
             Version version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
+#if DEBUG
+            Text += "  - by jie65535  - v" + version.ToString(3) + "-debug";
+#else
             Text += "  - by jie65535  - v" + version.ToString(3);
+#endif
 
             GameData.LoadResources();
 
diff --git a/Source/GrasscutterTools/GrasscutterTools.csproj b/Source/GrasscutterTools/GrasscutterTools.csproj
index 9513e19..0061ee0 100644
--- a/Source/GrasscutterTools/GrasscutterTools.csproj
+++ b/Source/GrasscutterTools/GrasscutterTools.csproj
@@ -326,7 +326,9 @@
     <Error Condition="!Exists('..\packages\Costura.Fody.5.7.0\build\Costura.Fody.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Costura.Fody.5.7.0\build\Costura.Fody.targets'))" />
     <Error Condition="!Exists('..\packages\Fody.6.6.1\build\Fody.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Fody.6.6.1\build\Fody.targets'))" />
     <Error Condition="!Exists('..\packages\Resource.Embedder.2.2.0\build\Resource.Embedder.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Resource.Embedder.2.2.0\build\Resource.Embedder.props'))" />
+    <Error Condition="!Exists('..\packages\NETStandard.Library.2.0.3\build\netstandard2.0\NETStandard.Library.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\NETStandard.Library.2.0.3\build\netstandard2.0\NETStandard.Library.targets'))" />
   </Target>
   <Import Project="..\packages\Costura.Fody.5.7.0\build\Costura.Fody.targets" Condition="Exists('..\packages\Costura.Fody.5.7.0\build\Costura.Fody.targets')" />
   <Import Project="..\packages\Fody.6.6.1\build\Fody.targets" Condition="Exists('..\packages\Fody.6.6.1\build\Fody.targets')" />
+  <Import Project="..\packages\NETStandard.Library.2.0.3\build\netstandard2.0\NETStandard.Library.targets" Condition="Exists('..\packages\NETStandard.Library.2.0.3\build\netstandard2.0\NETStandard.Library.targets')" />
 </Project>
\ No newline at end of file
diff --git a/Source/GrasscutterTools/Utils/HttpHelper.cs b/Source/GrasscutterTools/Utils/HttpHelper.cs
index b5fc7db..c3787ad 100644
--- a/Source/GrasscutterTools/Utils/HttpHelper.cs
+++ b/Source/GrasscutterTools/Utils/HttpHelper.cs
@@ -22,8 +22,15 @@ namespace GrasscutterTools.Utils
             try
             {
                 var responseMessage = await httpClient.GetAsync(url);
-                var responseString = await responseMessage.Content.ReadAsStringAsync();
-                return JsonConvert.DeserializeObject<T>(responseString);
+                if (responseMessage.IsSuccessStatusCode)
+                {
+                    var responseString = await responseMessage.Content.ReadAsStringAsync();
+                    return JsonConvert.DeserializeObject<T>(responseString);
+                }
+                else
+                {
+                    throw new HttpRequestException(responseMessage.ReasonPhrase);
+                }
             }
             catch (Exception ex)
             {
@@ -39,8 +46,15 @@ namespace GrasscutterTools.Utils
             {
                 var content = new StringContent(JsonConvert.SerializeObject(obj), Encoding.UTF8, "application/json");
                 var responseMessage = await httpClient.PostAsync(url, content);
-                var responseString = await responseMessage.Content.ReadAsStringAsync();
-                return JsonConvert.DeserializeObject<T>(responseString);
+                if (responseMessage.IsSuccessStatusCode)
+                {
+                    var responseString = await responseMessage.Content.ReadAsStringAsync();
+                    return JsonConvert.DeserializeObject<T>(responseString);
+                }
+                else
+                {
+                    throw new HttpRequestException(responseMessage.ReasonPhrase);
+                }
             }
             catch (Exception ex)
             {
diff --git a/Source/GrasscutterTools/packages.config b/Source/GrasscutterTools/packages.config
index 74d92ba..732969a 100644
--- a/Source/GrasscutterTools/packages.config
+++ b/Source/GrasscutterTools/packages.config
@@ -4,7 +4,7 @@
   <package id="Fody" version="6.6.1" targetFramework="net48" developmentDependency="true" />
   <package id="Microsoft.NETCore.Platforms" version="1.1.0" targetFramework="net48" />
   <package id="Microsoft.Win32.Primitives" version="4.3.0" targetFramework="net48" />
-  <package id="NETStandard.Library" version="1.6.1" targetFramework="net48" />
+  <package id="NETStandard.Library" version="2.0.3" targetFramework="net48" />
   <package id="Newtonsoft.Json" version="13.0.1" targetFramework="net452" />
   <package id="Resource.Embedder" version="2.2.0" targetFramework="net48" />
   <package id="System.AppContext" version="4.3.0" targetFramework="net48" />