diff --git a/lib/src/binding_coap/coap_extensions.dart b/lib/src/binding_coap/coap_extensions.dart
index 8e409f04..3b25f49e 100644
--- a/lib/src/binding_coap/coap_extensions.dart
+++ b/lib/src/binding_coap/coap_extensions.dart
@@ -1,3 +1,9 @@
+// Copyright 2022 Contributors to the Eclipse Foundation. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
 import "dart:io";
 import "dart:typed_data";
 
diff --git a/lib/src/binding_http/http_request_method.dart b/lib/src/binding_http/http_request_method.dart
index c8551bbe..4d7ed258 100644
--- a/lib/src/binding_http/http_request_method.dart
+++ b/lib/src/binding_http/http_request_method.dart
@@ -1,3 +1,9 @@
+// Copyright 2022 Contributors to the Eclipse Foundation. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
 import "../definitions/form.dart";
 import "../definitions/operation_type.dart";
 
diff --git a/lib/src/definitions/extensions/json_parser.dart b/lib/src/definitions/extensions/json_parser.dart
index bd1c1391..b1a3b01d 100644
--- a/lib/src/definitions/extensions/json_parser.dart
+++ b/lib/src/definitions/extensions/json_parser.dart
@@ -1,3 +1,9 @@
+// Copyright 2022 Contributors to the Eclipse Foundation. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
 import "package:collection/collection.dart";
 import "package:curie/curie.dart";
 
diff --git a/lib/src/definitions/version_info.dart b/lib/src/definitions/version_info.dart
index 1c3550f7..c2a485e7 100644
--- a/lib/src/definitions/version_info.dart
+++ b/lib/src/definitions/version_info.dart
@@ -1,3 +1,9 @@
+// Copyright 2022 Contributors to the Eclipse Foundation. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// SPDX-License-Identifier: BSD-3-Clause
+
 import "package:curie/curie.dart";
 
 import "extensions/json_parser.dart";