diff --git a/gajumaru-core/src/main/java/swiss/qpq/gajumaru/core/formatting/GajuFormat.java b/gajumaru-core/src/main/java/swiss/qpq/gajumaru/core/formatting/GajuFormat.java
index 199f2ec..f17c6bb 100644
--- a/gajumaru-core/src/main/java/swiss/qpq/gajumaru/core/formatting/GajuFormat.java
+++ b/gajumaru-core/src/main/java/swiss/qpq/gajumaru/core/formatting/GajuFormat.java
@@ -1,3 +1,23 @@
+/*
+ * Copyright (c) 2026 QPQ AG <info@qpq.swiss>. All rights reserved.
+ * Project: Gajumaru Core Java Libraries <gajumaru.io>
+ *
+ * This program is dual-licensed:
+ * 1) Under the GNU Affero General Public License as published by the Free 
+ *    Software Foundation, either version 3 of the License, or (at your option) 
+ *    any later version (AGPL-3.0-or-later).
+ *
+ * 2) Under a commercial/proprietary license available directly from QPQ AG.
+ *    If you wish to use this software outside the strict constraints of the 
+ *    AGPLv3 (e.g. within a closed-source or proprietary product), you must 
+ *    purchase a commercial license from QPQ AG.
+ *
+ * Authors:
+ *   - Craig Everett <craigeverett@qpq.swiss>
+ *
+ * SPDX-License-Identifier: AGPL-3.0-or-later OR LicenseRef-QPQ-Commercial
+ */
+
 package swiss.qpq.gajumaru.core.formatting;
 
 import java.math.BigInteger;