diff --git a/multi-binder-samples/multi-binder-two-kafka-clusters/pom.xml b/multi-binder-samples/multi-binder-two-kafka-clusters/pom.xml
index 6d92676..08901ab 100644
--- a/multi-binder-samples/multi-binder-two-kafka-clusters/pom.xml
+++ b/multi-binder-samples/multi-binder-two-kafka-clusters/pom.xml
@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.5.RELEASE</version>
+		<version>2.2.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/processor-samples/polled-consumer/pom.xml b/processor-samples/polled-consumer/pom.xml
index fdd96a3..61a6ccd 100644
--- a/processor-samples/polled-consumer/pom.xml
+++ b/processor-samples/polled-consumer/pom.xml
@@ -12,7 +12,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.6.RELEASE</version>
+		<version>2.2.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/testing-samples/test-embedded-kafka/pom.xml b/testing-samples/test-embedded-kafka/pom.xml
index 3405c03..f81a880 100644
--- a/testing-samples/test-embedded-kafka/pom.xml
+++ b/testing-samples/test-embedded-kafka/pom.xml
@@ -12,7 +12,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.5.RELEASE</version>
+		<version>2.2.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
diff --git a/testing-samples/testing-demo/pom.xml b/testing-samples/testing-demo/pom.xml
index 9499abe..940be81 100644
--- a/testing-samples/testing-demo/pom.xml
+++ b/testing-samples/testing-demo/pom.xml
@@ -12,7 +12,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.2.6.RELEASE</version>
+		<version>2.2.9.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>