diff --git a/vendor/github.com/mongodb/mongo-go-driver/event/monitoring.go b/vendor/github.com/mongodb/mongo-go-driver/event/monitoring.go
new file mode 100644
index 0000000..293fd40
--- /dev/null
+++ b/vendor/github.com/mongodb/mongo-go-driver/event/monitoring.go
@@ -0,0 +1,49 @@
+// Copyright (C) MongoDB, Inc. 2017-present.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
+
+package event
+
+import (
+	"context"
+
+	"github.com/mongodb/mongo-go-driver/bson"
+)
+
+// CommandStartedEvent represents an event generated when a command is sent to a server.
+type CommandStartedEvent struct {
+	Command      bson.Raw
+	DatabaseName string
+	CommandName  string
+	RequestID    int64
+	ConnectionID string
+}
+
+// CommandFinishedEvent represents a generic command finishing.
+type CommandFinishedEvent struct {
+	DurationNanos int64
+	CommandName   string
+	RequestID     int64
+	ConnectionID  string
+}
+
+// CommandSucceededEvent represents an event generated when a command's execution succeeds.
+type CommandSucceededEvent struct {
+	CommandFinishedEvent
+	Reply bson.Raw
+}
+
+// CommandFailedEvent represents an event generated when a command's execution fails.
+type CommandFailedEvent struct {
+	CommandFinishedEvent
+	Failure string
+}
+
+// CommandMonitor represents a monitor that is triggered for different events.
+type CommandMonitor struct {
+	Started   func(context.Context, *CommandStartedEvent)
+	Succeeded func(context.Context, *CommandSucceededEvent)
+	Failed    func(context.Context, *CommandFailedEvent)
+}