diff --git a/pkg/handlers/root_test.go b/pkg/handlers/root_test.go
index ae7c606..478e115 100644
--- a/pkg/handlers/root_test.go
+++ b/pkg/handlers/root_test.go
@@ -1,3 +1,5 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 package handlers
 
 import (
diff --git a/pkg/handlers/v2/handler_test.go b/pkg/handlers/v2/handler_test.go
index 55309e1..4f549ac 100644
--- a/pkg/handlers/v2/handler_test.go
+++ b/pkg/handlers/v2/handler_test.go
@@ -1,3 +1,5 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 package v2
 
 import (
diff --git a/pkg/metrics/prometheus.go b/pkg/metrics/prometheus.go
index 21b472d..403c905 100644
--- a/pkg/metrics/prometheus.go
+++ b/pkg/metrics/prometheus.go
@@ -1,3 +1,5 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 // Package metrics provides a metrics collector that stores metrics in Prometheus.
 package metrics
 
diff --git a/pkg/metrics/prometheus_test.go b/pkg/metrics/prometheus_test.go
index 6086ff6..4132c0e 100644
--- a/pkg/metrics/prometheus_test.go
+++ b/pkg/metrics/prometheus_test.go
@@ -1,3 +1,5 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT License.
 package metrics
 
 import (