diff --git a/examples/README.md b/examples/README.md
index 49c36c7..c25e8d8 100644
--- a/examples/README.md
+++ b/examples/README.md
@@ -31,6 +31,9 @@ cd /repos/kafka-messaging-e2ee/examples
 ## start the "springboot-fullmessage-multiple" example
 ./gradlew clean :springboot-fullmessage-multiple:bootRun
 
+## start the "springboot-fullmessage-single" example
+./gradlew clean :springboot-fullmessage-single:bootRun
+
 ## or start the "springboot-fieldlevel-multiple" example
 ./gradlew clean :springboot-fieldlevel-multiple:bootRun
 ```
diff --git a/examples/build.gradle b/examples/build.gradle
index 0ad2204..0c6b0ca 100644
--- a/examples/build.gradle
+++ b/examples/build.gradle
@@ -1,6 +1,6 @@
 plugins {
     // use composeUp and composeDown via grade. See https://github.com/avast/gradle-docker-compose-plugin
-    id 'com.avast.gradle.docker-compose' version '0.17.4'
+    id 'com.avast.gradle.docker-compose' version '0.17.12'
 }
 
 ext {
diff --git a/examples/springboot-fieldlevel-multiple/build.gradle b/examples/springboot-fieldlevel-multiple/build.gradle
index 8976354..0a58031 100644
--- a/examples/springboot-fieldlevel-multiple/build.gradle
+++ b/examples/springboot-fieldlevel-multiple/build.gradle
@@ -1,12 +1,12 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.1.2'
-    id 'io.spring.dependency-management' version '1.1.0'
+    id 'org.springframework.boot' version '3.4.2'
+    id 'io.spring.dependency-management' version '1.1.7'
 }
 
 group = 'de.otto.kafka.messaging.e2ee.examples'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '17'
+sourceCompatibility = '21'
 
 configurations {
     compileOnly {
diff --git a/examples/springboot-fieldlevel-multiple/src/main/java/de/otto/springboot/example/fieldlevel/multiple/ExampleFieldLevelMultipleSpringBootConfig.java b/examples/springboot-fieldlevel-multiple/src/main/java/de/otto/springboot/example/fieldlevel/multiple/ExampleFieldLevelMultipleSpringBootConfig.java
new file mode 100644
index 0000000..a462544
--- /dev/null
+++ b/examples/springboot-fieldlevel-multiple/src/main/java/de/otto/springboot/example/fieldlevel/multiple/ExampleFieldLevelMultipleSpringBootConfig.java
@@ -0,0 +1,14 @@
+package de.otto.springboot.example.fieldlevel.multiple;
+
+import java.time.Clock;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration(proxyBeanMethods = false)
+public class ExampleFieldLevelMultipleSpringBootConfig {
+
+  @Bean
+  public Clock clock() {
+    return Clock.systemDefaultZone();
+  }
+}
diff --git a/examples/springboot-fullmessage-multiple/build.gradle b/examples/springboot-fullmessage-multiple/build.gradle
index 89eff98..039bac6 100644
--- a/examples/springboot-fullmessage-multiple/build.gradle
+++ b/examples/springboot-fullmessage-multiple/build.gradle
@@ -1,12 +1,12 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.1.2'
-    id 'io.spring.dependency-management' version '1.1.0'
+    id 'org.springframework.boot' version '3.4.2'
+    id 'io.spring.dependency-management' version '1.1.7'
 }
 
 group = 'de.otto.kafka.messaging.e2ee.examples'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '17'
+sourceCompatibility = '21'
 
 configurations {
     compileOnly {
diff --git a/examples/springboot-fullmessage-single/build.gradle b/examples/springboot-fullmessage-single/build.gradle
index 89eff98..039bac6 100644
--- a/examples/springboot-fullmessage-single/build.gradle
+++ b/examples/springboot-fullmessage-single/build.gradle
@@ -1,12 +1,12 @@
 plugins {
     id 'java'
-    id 'org.springframework.boot' version '3.1.2'
-    id 'io.spring.dependency-management' version '1.1.0'
+    id 'org.springframework.boot' version '3.4.2'
+    id 'io.spring.dependency-management' version '1.1.7'
 }
 
 group = 'de.otto.kafka.messaging.e2ee.examples'
 version = '0.0.1-SNAPSHOT'
-sourceCompatibility = '17'
+sourceCompatibility = '21'
 
 configurations {
     compileOnly {