diff --git a/spring-cloud/spring-cloud-connectors-heroku/pom.xml b/spring-cloud/spring-cloud-connectors-heroku/pom.xml
index 1dad3ddcb7..c09a282197 100644
--- a/spring-cloud/spring-cloud-connectors-heroku/pom.xml
+++ b/spring-cloud/spring-cloud-connectors-heroku/pom.xml
@@ -9,9 +9,9 @@
 
     <parent>
         <groupId>com.baeldung</groupId>
-        <artifactId>parent-boot-1</artifactId>
+        <artifactId>parent-boot-2</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-boot-1</relativePath>
+        <relativePath>../../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>
@@ -35,6 +35,11 @@
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
         </dependency>
+        <dependency>
+            <groupId>net.bytebuddy</groupId>
+            <artifactId>byte-buddy-dep</artifactId>
+            <version>${bytebuddy.version}</version>
+        </dependency>
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
@@ -55,8 +60,9 @@
     </dependencyManagement>
 
     <properties>
-        <spring-cloud-dependencies.version>Brixton.SR7</spring-cloud-dependencies.version>
-        <postgresql.version>9.4-1201-jdbc4</postgresql.version>
+        <spring-cloud-dependencies.version>Hoxton.SR4</spring-cloud-dependencies.version>
+        <postgresql.version>42.2.10</postgresql.version>
+        <bytebuddy.version>1.10.10</bytebuddy.version>
     </properties>
     
 </project>
\ No newline at end of file
diff --git a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookController.java b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookController.java
index eb2972f35a..f998059028 100644
--- a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookController.java
+++ b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookController.java
@@ -1,5 +1,7 @@
 package com.baeldung.spring.cloud.connectors.heroku.book;
 
+import java.util.Optional;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
@@ -15,7 +17,7 @@ public class BookController {
     }
 
     @GetMapping("/{bookId}")
-    public Book findBook(@PathVariable Long bookId) {
+    public Optional<Book> findBook(@PathVariable Long bookId) {
         return bookService.findBookById(bookId);
     }
 
diff --git a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookService.java b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookService.java
index 4978ded65f..a83dfe64b7 100644
--- a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookService.java
+++ b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/book/BookService.java
@@ -1,5 +1,7 @@
 package com.baeldung.spring.cloud.connectors.heroku.book;
 
+import java.util.Optional;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Propagation;
@@ -15,8 +17,8 @@ public class BookService {
         this.bookRepository = bookRepository;
     }
 
-    public Book findBookById(Long bookId) {
-        return bookRepository.findOne(bookId);
+    public Optional<Book> findBookById(Long bookId) {
+        return bookRepository.findById(bookId);
     }
 
     @Transactional(propagation = Propagation.REQUIRED)
diff --git a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductController.java b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductController.java
index 51cf4412bf..7875c712f9 100644
--- a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductController.java
+++ b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductController.java
@@ -1,5 +1,7 @@
 package com.baeldung.spring.cloud.connectors.heroku.product;
 
+import java.util.Optional;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 
@@ -15,7 +17,7 @@ public class ProductController {
     }
 
     @GetMapping("/{productId}")
-    public Product findProduct(@PathVariable Long productId) {
+    public Optional<Product> findProduct(@PathVariable Long productId) {
         return productService.findProductById(productId);
     }
 
diff --git a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductService.java b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductService.java
index f25b4ecf7b..bdd13e9863 100644
--- a/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductService.java
+++ b/spring-cloud/spring-cloud-connectors-heroku/src/main/java/com/baeldung/spring/cloud/connectors/heroku/product/ProductService.java
@@ -1,5 +1,7 @@
 package com.baeldung.spring.cloud.connectors.heroku.product;
 
+import java.util.Optional;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Propagation;
@@ -15,8 +17,8 @@ public class ProductService {
         this.productRepository = productRepository;
     }
 
-    public Product findProductById(Long productId) {
-        return productRepository.findOne(productId);
+    public Optional<Product> findProductById(Long productId) {
+        return productRepository.findById(productId);
     }
 
     @Transactional(propagation = Propagation.REQUIRED)