diff --git a/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/Application.java b/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/Application.java
index d003b3f..d7be322 100644
--- a/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/Application.java
+++ b/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/Application.java
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: © 2021 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package eu.mulk.quarkus.googlecloud.jsonlogging.example;
 
 import org.springframework.boot.SpringApplication;
diff --git a/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RandomNumberParameterProvider.java b/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RandomNumberParameterProvider.java
index 7e4158c..7ca3511 100644
--- a/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RandomNumberParameterProvider.java
+++ b/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RandomNumberParameterProvider.java
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: © 2021 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package eu.mulk.quarkus.googlecloud.jsonlogging.example;
 
 import eu.mulk.quarkus.googlecloud.jsonlogging.KeyValueParameter;
diff --git a/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RootResource.java b/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RootResource.java
index b3197fd..78331ce 100644
--- a/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RootResource.java
+++ b/examples/spring-boot/src/main/java/eu/mulk/quarkus/googlecloud/jsonlogging/example/RootResource.java
@@ -1,3 +1,7 @@
+// SPDX-FileCopyrightText: © 2021 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
+//
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 package eu.mulk.quarkus.googlecloud.jsonlogging.example;
 
 import eu.mulk.quarkus.googlecloud.jsonlogging.KeyValueParameter;