diff --git a/node/Metrics.cpp b/node/Metrics.cpp
index 0175dfbb8..fe2a6593c 100644
--- a/node/Metrics.cpp
+++ b/node/Metrics.cpp
@@ -1,3 +1,15 @@
+/*
+ * Copyright (c)2013-2023 ZeroTier, Inc.
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file in the project's root directory.
+ *
+ * Change Date: 2025-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2.0 of the Apache License.
+ */
+
 #include <prometheus/simpleapi.h>
 
 namespace prometheus {
diff --git a/node/Metrics.hpp b/node/Metrics.hpp
index a84608f50..205ce1561 100644
--- a/node/Metrics.hpp
+++ b/node/Metrics.hpp
@@ -1,3 +1,14 @@
+/*
+ * Copyright (c)2013-2023 ZeroTier, Inc.
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file in the project's root directory.
+ *
+ * Change Date: 2025-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2.0 of the Apache License.
+ */
 #ifndef METRICS_H_
 #define METRICS_H_