diff --git a/Source/CSharp/MyTorrent.gRPC/MyTorrent.gRPC.csproj b/Source/CSharp/MyTorrent.gRPC/MyTorrent.gRPC.csproj
index 156d77a..daa19b9 100644
--- a/Source/CSharp/MyTorrent.gRPC/MyTorrent.gRPC.csproj
+++ b/Source/CSharp/MyTorrent.gRPC/MyTorrent.gRPC.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Google.Protobuf" Version="3.8.0" />
+    <PackageReference Include="Google.Protobuf" Version="3.15.0" />
     <PackageReference Include="Grpc" Version="2.23.0" />
     <PackageReference Include="Grpc.Tools" Version="2.23.0" PrivateAssets="All" />
   </ItemGroup>