diff --git a/examples/spring-boot/pom.xml b/examples/spring-boot/pom.xml
index cce1b04..a6dbb31 100644
--- a/examples/spring-boot/pom.xml
+++ b/examples/spring-boot/pom.xml
@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+SPDX-FileCopyrightText: © 2021 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
+
+SPDX-License-Identifier: GPL-3.0-or-later
+-->
+
 <project
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"
   xmlns="http://maven.apache.org/POM/4.0.0"
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;
diff --git a/examples/spring-boot/src/main/resources/application.properties b/examples/spring-boot/src/main/resources/application.properties
index c87d7c3..f4f3fa8 100644
--- a/examples/spring-boot/src/main/resources/application.properties
+++ b/examples/spring-boot/src/main/resources/application.properties
@@ -1 +1,5 @@
+# SPDX-FileCopyrightText: © 2021 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 logging.config = classpath:logging.properties
diff --git a/examples/spring-boot/src/main/resources/logging.properties b/examples/spring-boot/src/main/resources/logging.properties
index e80e0c6..31aebd7 100644
--- a/examples/spring-boot/src/main/resources/logging.properties
+++ b/examples/spring-boot/src/main/resources/logging.properties
@@ -1,2 +1,6 @@
+# SPDX-FileCopyrightText: © 2021 Matthias Andreas Benkard <code@mail.matthias.benkard.de>
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 handlers = eu.mulk.quarkus.googlecloud.jsonlogging.logmanager.DefaultConsoleHandler
 .level = INFO