diff --git a/Clients/Counter/Counter.csproj b/Clients/Counter/Counter.csproj
index c6a6d90..a65acd5 100644
--- a/Clients/Counter/Counter.csproj
+++ b/Clients/Counter/Counter.csproj
@@ -18,7 +18,7 @@
 
     <Compile Include="$(MSBuildThisFileDirectory)..\..\Shared\*.cs" />
 
-    <PackageReference Include="Google.Protobuf" Version="3.6.1" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Core" Version="1.17.0-pre3" />
     <PackageReference Include="Grpc.Tools" Version="1.17.0-pre3" />
   </ItemGroup>