diff --git a/csharp/core/FCUtil.csproj b/csharp/core/FCUtil.csproj
index 6dba94e..85012ba 100644
--- a/csharp/core/FCUtil.csproj
+++ b/csharp/core/FCUtil.csproj
@@ -47,7 +47,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="9.0.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
   </ItemGroup>