diff --git a/Makefile b/Makefile
index b2d3e05..c82e24a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,17 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (C) 2023 The Falco Authors.
+#
+# 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
+#
+# Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
+# specific language governing permissions and limitations under the License.
+#
+
 EMACS = emacs
 EMACSFLAGS =
 CASK = cask
diff --git a/flycheck-falco-rules.el b/flycheck-falco-rules.el
index 8aa610b..9c51e3c 100644
--- a/flycheck-falco-rules.el
+++ b/flycheck-falco-rules.el
@@ -1,6 +1,7 @@
 ;;; flycheck-falco-rules.el --- On-the-fly syntax checking for falco rules files -*- lexical-binding: t; -*-
+;; SPDX-License-Identifier: Apache-2.0
 ;;
-;; Copyright (C) 2022 The Falco Authors.
+;; Copyright (C) 2023 The Falco Authors.
 ;;
 ;;
 ;; Licensed under the Apache License, Version 2.0 (the "License");
diff --git a/test/flycheck-falco-rules-test.el b/test/flycheck-falco-rules-test.el
index 3535f25..417b535 100644
--- a/test/flycheck-falco-rules-test.el
+++ b/test/flycheck-falco-rules-test.el
@@ -1,4 +1,5 @@
 ;; flycheck-falco-rules-test.el --- Flycehck falco rules: Test suite
+;; SPDX-License-Identifier: Apache-2.0
 ;;
 ;; Copyright (C) 2022 The Falco Authors.
 ;;