diff --git a/pgpainless-core/src/main/java/org/pgpainless/algorithm/AlgorithmSuite.kt b/pgpainless-core/src/main/java/org/pgpainless/algorithm/AlgorithmSuite.kt
index 9bb2182e..0e4997fc 100644
--- a/pgpainless-core/src/main/java/org/pgpainless/algorithm/AlgorithmSuite.kt
+++ b/pgpainless-core/src/main/java/org/pgpainless/algorithm/AlgorithmSuite.kt
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
+//
+// SPDX-License-Identifier: Apache-2.0
+
 package org.pgpainless.algorithm
 
 class AlgorithmSuite(