diff --git a/chapter-3/chapter-3-spring-rest-json/pom.xml b/chapter-3/chapter-3-spring-rest-json/pom.xml
index 4056db7a..e6c84a98 100644
--- a/chapter-3/chapter-3-spring-rest-json/pom.xml
+++ b/chapter-3/chapter-3-spring-rest-json/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.4.1</version>
+		<version>3.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>
diff --git a/chapter-3/chapter-3-spring-webflux-rest-json/pom.xml b/chapter-3/chapter-3-spring-webflux-rest-json/pom.xml
index 44fafba5..7c0a07e7 100644
--- a/chapter-3/chapter-3-spring-webflux-rest-json/pom.xml
+++ b/chapter-3/chapter-3-spring-webflux-rest-json/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.4.1</version>
+		<version>3.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>
diff --git a/chapter-4/chapter-4-spring-data-jpa/pom.xml b/chapter-4/chapter-4-spring-data-jpa/pom.xml
index 77728cc9..fdf6ac9d 100644
--- a/chapter-4/chapter-4-spring-data-jpa/pom.xml
+++ b/chapter-4/chapter-4-spring-data-jpa/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.4.1</version>
+		<version>3.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>
diff --git a/chapter-4/chapter-4-spring-data-r2dbc/pom.xml b/chapter-4/chapter-4-spring-data-r2dbc/pom.xml
index 80029319..9a27f185 100644
--- a/chapter-4/chapter-4-spring-data-r2dbc/pom.xml
+++ b/chapter-4/chapter-4-spring-data-r2dbc/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.4.1</version>
+		<version>3.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>
diff --git a/chapter-5/chapter-5-spring-cloud-events/pom.xml b/chapter-5/chapter-5-spring-cloud-events/pom.xml
index 77013e1a..bf11848b 100644
--- a/chapter-5/chapter-5-spring-cloud-events/pom.xml
+++ b/chapter-5/chapter-5-spring-cloud-events/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.springframework.boot</groupId>
     <artifactId>spring-boot-starter-parent</artifactId>
-    <version>3.4.1</version>
+    <version>3.4.2</version>
     <relativePath />
   </parent>
 
diff --git a/chapter-5/chapter-5-spring-eventbus/pom.xml b/chapter-5/chapter-5-spring-eventbus/pom.xml
index bccb6b0b..c2ffd22e 100644
--- a/chapter-5/chapter-5-spring-eventbus/pom.xml
+++ b/chapter-5/chapter-5-spring-eventbus/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.4.1</version>
+		<version>3.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>
diff --git a/chapter-5/chapter-5-spring-kafka-streams/pom.xml b/chapter-5/chapter-5-spring-kafka-streams/pom.xml
index faa2b6c0..43d38d36 100644
--- a/chapter-5/chapter-5-spring-kafka-streams/pom.xml
+++ b/chapter-5/chapter-5-spring-kafka-streams/pom.xml
@@ -5,7 +5,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>3.4.1</version>
+		<version>3.4.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>