diff --git a/net/mailservice/OASP4Net.Business.Common/OASP4Net.Business.Common.csproj b/net/mailservice/OASP4Net.Business.Common/OASP4Net.Business.Common.csproj
index d09ba2776..4fa2caa8c 100644
--- a/net/mailservice/OASP4Net.Business.Common/OASP4Net.Business.Common.csproj
+++ b/net/mailservice/OASP4Net.Business.Common/OASP4Net.Business.Common.csproj
@@ -15,7 +15,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Mvc.ViewFeatures" Version="2.0.0" />
     <PackageReference Include="Microsoft.Extensions.PlatformAbstractions" Version="1.1.0" />
     <PackageReference Include="MimeKit" Version="1.12.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.2" />
   </ItemGroup>
 
   <ItemGroup>