diff --git a/build.gradle b/build.gradle
index 6d98ac6..75332b3 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-	id 'org.springframework.boot' version '3.5.11'
+	id 'org.springframework.boot' version '4.0.3'
 	id 'io.spring.dependency-management' version '1.1.7'
 	id 'java'
   id "au.com.dius.pact" version "4.6.20"
diff --git a/src/main/java/io/pactflow/example/kafka/ProductMessageBuilder.java b/src/main/java/io/pactflow/example/kafka/ProductMessageBuilder.java
index b5eb050..2dba71c 100644
--- a/src/main/java/io/pactflow/example/kafka/ProductMessageBuilder.java
+++ b/src/main/java/io/pactflow/example/kafka/ProductMessageBuilder.java
@@ -1,8 +1,8 @@
 package io.pactflow.example.kafka;
 
 import org.springframework.messaging.Message;
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.ObjectMapper;
 import org.springframework.kafka.support.KafkaHeaders;
 import org.springframework.messaging.support.MessageBuilder;
 
@@ -15,7 +15,7 @@ public ProductMessageBuilder withProduct(ProductEvent product) {
     return this;
   }
 
-  public Message<String> build() throws JsonProcessingException {
+  public Message<String> build() throws JacksonException {
     return MessageBuilder.withPayload(this.mapper.writeValueAsString(this.product))
         .setHeader(KafkaHeaders.TOPIC, "products").setHeader("Content-Type", "application/json; charset=utf-8")
         .build();
diff --git a/src/main/java/io/pactflow/example/kafka/ProductRepository.java b/src/main/java/io/pactflow/example/kafka/ProductRepository.java
index de977f2..4d582f3 100644
--- a/src/main/java/io/pactflow/example/kafka/ProductRepository.java
+++ b/src/main/java/io/pactflow/example/kafka/ProductRepository.java
@@ -1,6 +1,6 @@
 package io.pactflow.example.kafka;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
+import tools.jackson.core.JacksonException;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -22,7 +22,7 @@ public void save(final ProductEvent product) {
       Message<String> message = new ProductMessageBuilder().withProduct(product).build();
       this.template.send(message);
 
-    } catch (final JsonProcessingException e) {
+    } catch (final JacksonException e) {
       logger.error("unable to serialise product to JSON", e);
     }
   }
diff --git a/src/test/java/io/pactflow/example/kafka/ProductsKafkaProducerTest.java b/src/test/java/io/pactflow/example/kafka/ProductsKafkaProducerTest.java
index 2dfd9d2..3331caf 100644
--- a/src/test/java/io/pactflow/example/kafka/ProductsKafkaProducerTest.java
+++ b/src/test/java/io/pactflow/example/kafka/ProductsKafkaProducerTest.java
@@ -15,7 +15,7 @@
 
 import java.util.HashMap;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
+import tools.jackson.core.JacksonException;
 
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.TestTemplate;
@@ -42,7 +42,7 @@ void before(PactVerificationContext context) {
   }
 
   @PactVerifyProvider("a product event update")
-  public MessageAndMetadata productUpdateEvent() throws JsonProcessingException {
+  public MessageAndMetadata productUpdateEvent() throws JacksonException {
     ProductEvent product = new ProductEvent("id1", "product name", "product type", "v1", EventType.UPDATED, 15.00);
     Message<String> message = new ProductMessageBuilder().withProduct(product).build();
 
@@ -50,7 +50,7 @@ public MessageAndMetadata productUpdateEvent() throws JsonProcessingException {
   }
 
   @PactVerifyProvider("a product created event")
-  public MessageAndMetadata productCreatedEvent() throws JsonProcessingException {
+  public MessageAndMetadata productCreatedEvent() throws JacksonException {
     ProductEvent product = new ProductEvent("id1", "product name", "product type", "v1", EventType.CREATED, 27.00);
     Message<String> message = new ProductMessageBuilder().withProduct(product).build();