diff --git a/SimpleStockTickerSample/grpc/SimpleStockTicker/src/TraderSys.SimpleStockTickerServer.Client/TraderSys.SimpleStockTickerServer.Client.csproj b/SimpleStockTickerSample/grpc/SimpleStockTicker/src/TraderSys.SimpleStockTickerServer.Client/TraderSys.SimpleStockTickerServer.Client.csproj
index 01a6e04..86e690c 100644
--- a/SimpleStockTickerSample/grpc/SimpleStockTicker/src/TraderSys.SimpleStockTickerServer.Client/TraderSys.SimpleStockTickerServer.Client.csproj
+++ b/SimpleStockTickerSample/grpc/SimpleStockTicker/src/TraderSys.SimpleStockTickerServer.Client/TraderSys.SimpleStockTickerServer.Client.csproj
@@ -1,11 +1,11 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
         <TargetFramework>netstandard2.1</TargetFramework>
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Google.Protobuf" Version="3.9.1" />
+        <PackageReference Include="Google.Protobuf" Version="3.15.0" />
         <PackageReference Include="Grpc.Net.ClientFactory" Version="0.2.23-pre1" />
         <PackageReference Include="Grpc.Tools" Version="2.23.0">
             <PrivateAssets>all</PrivateAssets>