diff --git a/google-cloud-spanner-v1/lib/google/spanner/v1/commit_response_pb.rb b/google-cloud-spanner-v1/lib/google/spanner/v1/commit_response_pb.rb
index eac6aebcce64..607a4aa4cabc 100644
--- a/google-cloud-spanner-v1/lib/google/spanner/v1/commit_response_pb.rb
+++ b/google-cloud-spanner-v1/lib/google/spanner/v1/commit_response_pb.rb
@@ -10,7 +10,7 @@
 require 'google/spanner/v1/transaction_pb'
 
 
-descriptor_data = "\n\'google/spanner/v1/commit_response.proto\x12\x11google.spanner.v1\x1a\x1fgoogle/api/field_behavior.proto\x1a\x1fgoogle/protobuf/timestamp.proto\x1a google/spanner/v1/location.proto\x1a#google/spanner/v1/transaction.proto\"\x90\x03\n\x0e\x43ommitResponse\x12\x34\n\x10\x63ommit_timestamp\x18\x01 \x01(\x0b\x32\x1a.google.protobuf.Timestamp\x12\x43\n\x0c\x63ommit_stats\x18\x02 \x01(\x0b\x32-.google.spanner.v1.CommitResponse.CommitStats\x12N\n\x0fprecommit_token\x18\x04 \x01(\x0b\x32\x33.google.spanner.v1.MultiplexedSessionPrecommitTokenH\x00\x12\x36\n\x12snapshot_timestamp\x18\x05 \x01(\x0b\x32\x1a.google.protobuf.Timestamp\x12\x39\n\x0c\x63\x61\x63he_update\x18\x06 \x01(\x0b\x32\x1e.google.spanner.v1.CacheUpdateB\x03\xe0\x41\x01\x1a%\n\x0b\x43ommitStats\x12\x16\n\x0emutation_count\x18\x01 \x01(\x03\x42\x19\n\x17MultiplexedSessionRetryB\xb6\x01\n\x15\x63om.google.spanner.v1B\x13\x43ommitResponseProtoP\x01Z5cloud.google.com/go/spanner/apiv1/spannerpb;spannerpb\xaa\x02\x17Google.Cloud.Spanner.V1\xca\x02\x17Google\\Cloud\\Spanner\\V1\xea\x02\x1aGoogle::Cloud::Spanner::V1b\x06proto3"
+descriptor_data = "\n\'google/spanner/v1/commit_response.proto\x12\x11google.spanner.v1\x1a\x1fgoogle/api/field_behavior.proto\x1a\x1fgoogle/protobuf/timestamp.proto\x1a google/spanner/v1/location.proto\x1a#google/spanner/v1/transaction.proto\"\xb5\x04\n\x0e\x43ommitResponse\x12\x34\n\x10\x63ommit_timestamp\x18\x01 \x01(\x0b\x32\x1a.google.protobuf.Timestamp\x12\x43\n\x0c\x63ommit_stats\x18\x02 \x01(\x0b\x32-.google.spanner.v1.CommitResponse.CommitStats\x12N\n\x0fprecommit_token\x18\x04 \x01(\x0b\x32\x33.google.spanner.v1.MultiplexedSessionPrecommitTokenH\x00\x12\x36\n\x12snapshot_timestamp\x18\x05 \x01(\x0b\x32\x1a.google.protobuf.Timestamp\x12\x39\n\x0c\x63\x61\x63he_update\x18\x06 \x01(\x0b\x32\x1e.google.spanner.v1.CacheUpdateB\x03\xe0\x41\x01\x12M\n\x0fisolation_level\x18\x07 \x01(\x0e\x32\x34.google.spanner.v1.TransactionOptions.IsolationLevel\x12T\n\x0eread_lock_mode\x18\x08 \x01(\x0e\x32<.google.spanner.v1.TransactionOptions.ReadWrite.ReadLockMode\x1a%\n\x0b\x43ommitStats\x12\x16\n\x0emutation_count\x18\x01 \x01(\x03\x42\x19\n\x17MultiplexedSessionRetryB\xb6\x01\n\x15\x63om.google.spanner.v1B\x13\x43ommitResponseProtoP\x01Z5cloud.google.com/go/spanner/apiv1/spannerpb;spannerpb\xaa\x02\x17Google.Cloud.Spanner.V1\xca\x02\x17Google\\Cloud\\Spanner\\V1\xea\x02\x1aGoogle::Cloud::Spanner::V1b\x06proto3"
 
 pool = ::Google::Protobuf::DescriptorPool.generated_pool
 pool.add_serialized_file(descriptor_data)
diff --git a/google-cloud-spanner-v1/proto_docs/google/spanner/v1/commit_response.rb b/google-cloud-spanner-v1/proto_docs/google/spanner/v1/commit_response.rb
index 33d4d5942988..29c0a6add755 100644
--- a/google-cloud-spanner-v1/proto_docs/google/spanner/v1/commit_response.rb
+++ b/google-cloud-spanner-v1/proto_docs/google/spanner/v1/commit_response.rb
@@ -48,6 +48,12 @@ module V1
         #     in response to requests that included a `RoutingHint` field, but may also
         #     be obtained by explicit location-fetching RPCs which may be added in the
         #     future.
+        # @!attribute [rw] isolation_level
+        #   @return [::Google::Cloud::Spanner::V1::TransactionOptions::IsolationLevel]
+        #     The isolation level used for the read-write transaction.
+        # @!attribute [rw] read_lock_mode
+        #   @return [::Google::Cloud::Spanner::V1::TransactionOptions::ReadWrite::ReadLockMode]
+        #     The read lock mode used for the read-write transaction.
         class CommitResponse
           include ::Google::Protobuf::MessageExts
           extend ::Google::Protobuf::MessageExts::ClassMethods