Fix version of Google.Apis.Auth required by Grpc.Auth nuget.
diff --git a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec b/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
index 2dc10d2..f1f8f7c 100644
--- a/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
+++ b/src/csharp/Grpc.Auth/Grpc.Auth.nuspec
@@ -15,7 +15,7 @@
<copyright>Copyright 2015, Google Inc.</copyright>
<tags>gRPC RPC Protocol HTTP/2 Auth OAuth2</tags>
<dependencies>
- <dependency id="Google.Apis.Auth" version="1.9.2" />
+ <dependency id="Google.Apis.Auth" version="1.9.3" />
<dependency id="Grpc.Core" version="$version$" />
</dependencies>
</metadata>