diff --git a/.netcore3/grpc/ImageDownloader/Client/Client.csproj b/.netcore3/grpc/ImageDownloader/Client/Client.csproj
index 327f44a..190cf8b 100644
--- a/.netcore3/grpc/ImageDownloader/Client/Client.csproj
+++ b/.netcore3/grpc/ImageDownloader/Client/Client.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.9.2" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.23.2" />
     <PackageReference Include="Grpc.Tools" Version="2.24.0">
       <PrivateAssets>all</PrivateAssets>