diff --git a/MilvusDemo/MilvusDemo.csproj b/MilvusDemo/MilvusDemo.csproj
index 7b77bb2..ed0b8b8 100644
--- a/MilvusDemo/MilvusDemo.csproj
+++ b/MilvusDemo/MilvusDemo.csproj
@@ -8,6 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
     <PackageReference Include="Milvus.Client" Version="2.3.0-preview.1" />
   </ItemGroup>