diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/Converters/Internal/Newtonsoft.Json/Object/FlattenNArrayObjectConverterBase.cs b/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/Converters/Internal/Newtonsoft.Json/Object/FlattenNArrayObjectConverterBase.cs
index c1e82d95..44e197f9 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/Converters/Internal/Newtonsoft.Json/Object/FlattenNArrayObjectConverterBase.cs
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/Converters/Internal/Newtonsoft.Json/Object/FlattenNArrayObjectConverterBase.cs
@@ -140,7 +140,7 @@ namespace Newtonsoft.Json.Converters
                 if (!(jsonContractProperty.ShouldSerialize == null || jsonContractProperty.ShouldSerialize(value)))
                     continue;
 
-                string propertyName = jsonContractProperty.PropertyName;
+                string propertyName = jsonContractProperty.PropertyName!;
                 object? propertyValue = jsonContractProperty.ValueProvider?.GetValue(value);
                 if (propertyValue is null)
                 {
diff --git a/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/SKIT.FlurlHttpClient.Wechat.TenpayV2.csproj b/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/SKIT.FlurlHttpClient.Wechat.TenpayV2.csproj
index 44269593..aa1e6e2e 100644
--- a/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/SKIT.FlurlHttpClient.Wechat.TenpayV2.csproj
+++ b/src/SKIT.FlurlHttpClient.Wechat.TenpayV2/SKIT.FlurlHttpClient.Wechat.TenpayV2.csproj
@@ -41,7 +41,7 @@
     </ItemGroup>
 
     <ItemGroup>
-		<PackageReference Include="SKIT.FlurlHttpClient.Common" Version="2.2.0" />
+		<PackageReference Include="SKIT.FlurlHttpClient.Common" Version="2.3.1" />
     </ItemGroup>
 
 </Project>
\ No newline at end of file