diff --git a/README.md b/README.md
index 1e6ccf3..fac3a2a 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ These instructions will get you and overview of how to synchronize two different
 
 What things you need to run the software:
 
-* Java 8+
+* Java 11+
 * [docker-compose](https://docs.docker.com/compose/)
 
 ## Overview
diff --git a/explicit-with-dto/pom.xml b/explicit-with-dto/pom.xml
index 7a29a84..ede6c7e 100644
--- a/explicit-with-dto/pom.xml
+++ b/explicit-with-dto/pom.xml
@@ -10,14 +10,16 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
         <spring-cloud.version>Finchley.SR1</spring-cloud.version>
     </properties>
 
@@ -41,8 +43,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>
diff --git a/explicit-with-entity/pom.xml b/explicit-with-entity/pom.xml
index 2ab36e1..78786b1 100644
--- a/explicit-with-entity/pom.xml
+++ b/explicit-with-entity/pom.xml
@@ -11,7 +11,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
@@ -19,7 +19,9 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
         <spring-cloud.version>Finchley.SR1</spring-cloud.version>
     </properties>
 
@@ -43,8 +45,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>
diff --git a/in-one-class/pom.xml b/in-one-class/pom.xml
index 67443f9..297d821 100644
--- a/in-one-class/pom.xml
+++ b/in-one-class/pom.xml
@@ -12,14 +12,16 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
         <spring-cloud.version>Finchley.SR1</spring-cloud.version>
     </properties>
 
@@ -36,7 +38,6 @@
     </dependencyManagement>
 
     <build>
-
         <plugins>
             <plugin>
                 <groupId>org.springframework.boot</groupId>
@@ -44,8 +45,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>
diff --git a/with-application-events-immutable/pom.xml b/with-application-events-immutable/pom.xml
index 22b8694..b09f30b 100644
--- a/with-application-events-immutable/pom.xml
+++ b/with-application-events-immutable/pom.xml
@@ -10,14 +10,16 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
         <spring-cloud.version>Finchley.SR1</spring-cloud.version>
     </properties>
 
@@ -41,8 +43,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>
diff --git a/with-application-events/pom.xml b/with-application-events/pom.xml
index cdee9e8..d91f779 100644
--- a/with-application-events/pom.xml
+++ b/with-application-events/pom.xml
@@ -10,14 +10,16 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
         <spring-cloud.version>Finchley.SR1</spring-cloud.version>
     </properties>
 
@@ -41,8 +43,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>
diff --git a/with-events/with-events-sink/pom.xml b/with-events/with-events-sink/pom.xml
index 274da9f..db97017 100644
--- a/with-events/with-events-sink/pom.xml
+++ b/with-events/with-events-sink/pom.xml
@@ -11,15 +11,17 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.0.4.RELEASE</version>
+		<version>2.1.4.RELEASE</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-		<java.version>1.8</java.version>
-		<spring-cloud.version>Finchley.SR1</spring-cloud.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+		<spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
 	</properties>
 
 	<dependencyManagement>
@@ -34,34 +36,37 @@
 		</dependencies>
 	</dependencyManagement>
 
-	<build>
-			<plugins>
-				<plugin>
-					<groupId>org.springframework.boot</groupId>
-					<artifactId>spring-boot-maven-plugin</artifactId>
-					<executions>
-						<execution>
-							<goals>
-								<goal>repackage</goal>
-							</goals>
-						</execution>
-					</executions>
-				</plugin>
-				<plugin>
-					<groupId>org.apache.maven.plugins</groupId>
-					<artifactId>maven-surefire-plugin</artifactId>
-					<version>2.20</version>
-					<configuration>
-						<includes>
-							<include>**/*Spec.*</include>
-							<include>**/*Tests.*</include>
-							<include>**/*Test.*</include>
-						</includes>
-						<reportFormat>plain</reportFormat>
-					</configuration>
-				</plugin>
-			</plugins>
-	</build>
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.22.1</version>
+                <configuration>
+                    <includes>
+                        <include>**/*Spec.*</include>
+                        <include>**/*Tests.*</include>
+                        <include>**/*Test.*</include>
+                    </includes>
+                    <reportFormat>plain</reportFormat>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 
 	<dependencies>
 
diff --git a/with-events/with-events-source/pom.xml b/with-events/with-events-source/pom.xml
index d0d10d8..179c740 100644
--- a/with-events/with-events-source/pom.xml
+++ b/with-events/with-events-source/pom.xml
@@ -11,15 +11,17 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
-        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
     </properties>
 
     <dependencyManagement>
@@ -42,8 +44,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>
diff --git a/with-log-tailing/pom.xml b/with-log-tailing/pom.xml
index 6379966..5e50d81 100644
--- a/with-log-tailing/pom.xml
+++ b/with-log-tailing/pom.xml
@@ -11,15 +11,17 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
-        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <spring-cloud.version>Greenwich.RELEASE</spring-cloud.version>
     </properties>
 
     <dependencyManagement>
@@ -42,8 +44,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>
diff --git a/with-trigger/pom.xml b/with-trigger/pom.xml
index 12bc6b5..0c43f55 100644
--- a/with-trigger/pom.xml
+++ b/with-trigger/pom.xml
@@ -11,14 +11,16 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>2.0.4.RELEASE</version>
+        <version>2.1.4.RELEASE</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <java.version>1.8</java.version>
+        <java.version>11</java.version>
+        <maven.compiler.source>${java.version}</maven.compiler.source>
+        <maven.compiler.target>${java.version}</maven.compiler.target>
         <spring-cloud.version>Finchley.SR1</spring-cloud.version>
     </properties>
 
@@ -42,8 +44,18 @@
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.0</version>
+                <configuration>
+                    <source>${maven.compiler.source}</source>
+                    <target>${maven.compiler.target}</target>
+                    <release>${java.version}</release>
+                    <verbose>true</verbose>
+                </configuration>
+            </plugin>
+            <plugin>
                 <artifactId>maven-surefire-plugin</artifactId>
-                <version>2.20</version>
+                <version>2.22.1</version>
                 <configuration>
                     <includes>
                         <include>**/*Spec.*</include>