diff --git a/src/main/resources/templates/layout.html b/src/main/resources/templates/layout.html
index 1e02e96..34dd24b 100644
--- a/src/main/resources/templates/layout.html
+++ b/src/main/resources/templates/layout.html
@@ -27,6 +27,11 @@ SPDX-FileCopyrightText: 2023 swt23w23
 				<p class="text-center">
 					<a href="mailto:catering@salespointframework.org">catering@salespointframework.org</a>
 				</p>
+				<p class="text-center text-secondary">
+					Diese Software ist freie Software, lizensiert unter der GNU Affero General Public License,
+					Version 3 oder neuer
+					(<a href="https://git.sbruder.de/mirrors/swt23w23">Quelltext</a>).
+				</p>
 			</footer>
 		</div>
 		<script th:src="@{/webjars/bootstrap/js/bootstrap.bundle.min.js}"></script>