diff --git a/google/cloud/iam_credentials_v1/proto/common.proto b/google/cloud/iam_credentials_v1/proto/common.proto
index 361f2e9..045a0df 100644
--- a/google/cloud/iam_credentials_v1/proto/common.proto
+++ b/google/cloud/iam_credentials_v1/proto/common.proto
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 syntax = "proto3";
 
@@ -23,6 +22,7 @@ import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
 
 option cc_enable_arenas = true;
+option csharp_namespace = "Google.Cloud.Iam.Credentials.V1";
 option go_package = "google.golang.org/genproto/googleapis/iam/credentials/v1;credentials";
 option java_multiple_files = true;
 option java_outer_classname = "IAMCredentialsCommonProto";
diff --git a/google/cloud/iam_credentials_v1/proto/iamcredentials.proto b/google/cloud/iam_credentials_v1/proto/iamcredentials.proto
index 29554c5..b5dcae8 100644
--- a/google/cloud/iam_credentials_v1/proto/iamcredentials.proto
+++ b/google/cloud/iam_credentials_v1/proto/iamcredentials.proto
@@ -1,4 +1,4 @@
-// Copyright 2019 Google LLC.
+// Copyright 2020 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -11,7 +11,6 @@
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
-//
 
 syntax = "proto3";
 
@@ -22,6 +21,7 @@ import "google/api/client.proto";
 import "google/iam/credentials/v1/common.proto";
 
 option cc_enable_arenas = true;
+option csharp_namespace = "Google.Cloud.Iam.Credentials.V1";
 option go_package = "google.golang.org/genproto/googleapis/iam/credentials/v1;credentials";
 option java_multiple_files = true;
 option java_outer_classname = "IAMCredentialsProto";
diff --git a/synth.metadata b/synth.metadata
index 513d2e2..89c8291 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/python-iam.git",
-        "sha": "6abd0965b93c377d37158991215c7d963b90deb7"
+        "sha": "8f5023dbb24a8151bfcd967261904797d8d74b5b"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "dd372aa22ded7a8ba6f0e03a80e06358a3fa0907",
-        "internalRef": "347055288"
+        "sha": "bdab50fe10ce3190812697e06f2e860780e9095e",
+        "internalRef": "347327128"
       }
     },
     {