diff --git a/chapter-3/chapter-3-spring-rest-json/pom.xml b/chapter-3/chapter-3-spring-rest-json/pom.xml
index 703793c3..8ef41898 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>3.3.3</version>
+		<version>3.3.4</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 8e916fbf..8e7e514f 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>3.3.3</version>
+		<version>3.3.4</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 7584f758..d0e85dc9 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>3.3.3</version>
+		<version>3.3.4</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 8dd6b73c..02954f33 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>3.3.3</version>
+		<version>3.3.4</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 c0a9c9ad..0a8b112b 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>3.3.3</version>
+    <version>3.3.4</version>
     <relativePath />
   </parent>
 
diff --git a/chapter-5/chapter-5-spring-eventbus/pom.xml b/chapter-5/chapter-5-spring-eventbus/pom.xml
index b7c9b1c3..65a261f9 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>3.3.3</version>
+		<version>3.3.4</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 d7221ccc..13c660f2 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>3.3.3</version>
+		<version>3.3.4</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>org.acme</groupId>