diff --git a/section3/GrpcMicroservices/ShoppingCartWorkerService/ShoppingCartWorkerService.csproj b/section3/GrpcMicroservices/ShoppingCartWorkerService/ShoppingCartWorkerService.csproj
index 4512d35..c0c40bf 100644
--- a/section3/GrpcMicroservices/ShoppingCartWorkerService/ShoppingCartWorkerService.csproj
+++ b/section3/GrpcMicroservices/ShoppingCartWorkerService/ShoppingCartWorkerService.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.13.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Net.ClientFactory" Version="2.33.1" />
     <PackageReference Include="Grpc.Tools" Version="2.33.1">
       <PrivateAssets>all</PrivateAssets>