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While running a Spring Boot application with spring-integration-kafka library, I am getting the following error:

Caused by: java.lang.ClassNotFoundException: org.springframework.kafka.support.KafkaHeaderMapper

The exception is thrown at the first line in the body of the following method:

@ServiceActivator(inputChannel = "producerChannel")
public MessageHandler kafkaMessageHandler() {
    KafkaProducerMessageHandler<String, String> handler =
        new KafkaProducerMessageHandler<>(kafkaTemplate());
    handler.setMessageKeyExpression(new LiteralExpression("kafka-integration"));
    return handler;
My pom.xml is:
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.9.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>
</properties>
<dependencies>
    <dependency>
        <groupId>org.apache.kafka</groupId>
        <artifactId>kafka-clients</artifactId>
        <version>1.0.0</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-integration</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.integration</groupId>
        <artifactId>spring-integration-kafka</artifactId>
        <version>2.3.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.kafka</groupId>
        <artifactId>spring-kafka</artifactId>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <optional>true</optional>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
What am I missing?
See the compatibility matrix on the Spring for Apache Kafka project page.
Spring Integration Kafka 2.3.x requires spring-kafka version 1.3.x.
Boot 1.5.x pulls in 1.1.x by default.
Add <version>1.3.2.RELEASE</version> to the spring-kafka dependency.
        
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