diff --git a/src/GrpcGreeterClient/GrpcGreeterClient.csproj b/src/GrpcGreeterClient/GrpcGreeterClient.csproj
index 897320a..3608da0 100644
--- a/src/GrpcGreeterClient/GrpcGreeterClient.csproj
+++ b/src/GrpcGreeterClient/GrpcGreeterClient.csproj
@@ -5,7 +5,7 @@
     <TargetFramework>netcoreapp3.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.10.0-rc1" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.23.2" />
     <PackageReference Include="Grpc.Reflection" Version="2.24.0-pre1" />
     <PackageReference Include="Grpc.Tools" Version="2.24.0-pre1" PrivateAssets="All" />