diff --git a/examples/spring-mail-integration-demo/pom.xml b/examples/spring-mail-integration-demo/pom.xml
index 613bd25e..aabb04bf 100644
--- a/examples/spring-mail-integration-demo/pom.xml
+++ b/examples/spring-mail-integration-demo/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.4.5</version>
+		<version>2.5.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/examples/spring-mail-rabbitmq-demo/docker-compose.yml b/examples/spring-mail-rabbitmq-demo/docker-compose.yml
index 9dbda249..2bdf971a 100644
--- a/examples/spring-mail-rabbitmq-demo/docker-compose.yml
+++ b/examples/spring-mail-rabbitmq-demo/docker-compose.yml
@@ -1,5 +1,7 @@
-rabbitmq:
-  image: rabbitmq:management
-  ports:
-    - "5672:5672"
-    - "15672:15672"
\ No newline at end of file
+version: '3'
+services:
+  rabbitmq:
+    image: rabbitmq:management
+    ports:
+      - "5672:5672"
+      - "15672:15672"
\ No newline at end of file
diff --git a/examples/spring-mail-rabbitmq-demo/user-activity-emitter-microservice/pom.xml b/examples/spring-mail-rabbitmq-demo/user-activity-emitter-microservice/pom.xml
index 0cb19192..5c832513 100644
--- a/examples/spring-mail-rabbitmq-demo/user-activity-emitter-microservice/pom.xml
+++ b/examples/spring-mail-rabbitmq-demo/user-activity-emitter-microservice/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.4.5</version>
+		<version>2.5.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/pom.xml b/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/pom.xml
index 423bacee..bcedb2e1 100644
--- a/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/pom.xml
+++ b/examples/spring-mail-rabbitmq-demo/user-activity-processor-microservice/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.4.5</version>
+		<version>2.5.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>