diff --git a/Mango.Nop.Core/Mango.Nop.Core.csproj b/Mango.Nop.Core/Mango.Nop.Core.csproj
index 68f0fef..98446ed 100644
--- a/Mango.Nop.Core/Mango.Nop.Core.csproj
+++ b/Mango.Nop.Core/Mango.Nop.Core.csproj
@@ -7,6 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="MessagePack.Annotations" Version="2.5.192" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="8.0.10" />
   </ItemGroup>
 
diff --git a/Mango.Nop.Services/Mango.Nop.Services.csproj b/Mango.Nop.Services/Mango.Nop.Services.csproj
index 4e4e53c..2966d8a 100644
--- a/Mango.Nop.Services/Mango.Nop.Services.csproj
+++ b/Mango.Nop.Services/Mango.Nop.Services.csproj
@@ -7,6 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="MessagePack.Annotations" Version="2.5.192" />
     <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="8.0.10" />
   </ItemGroup>