diff --git a/pom.xml b/pom.xml
index 4533817..bdd0587 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1,11 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.5.7</version>
+        <version>4.0.0</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
 
@@ -23,7 +24,7 @@
             <dependency>
                 <groupId>it.aboutbits</groupId>
                 <artifactId>spring-boot-toolbox</artifactId>
-                <version>1.7.0</version>
+                <version>2.0.0</version>
             </dependency>
         </dependencies>
     </dependencyManagement>
@@ -117,12 +118,12 @@
                     <dependency>
                         <groupId>com.puppycrawl.tools</groupId>
                         <artifactId>checkstyle</artifactId>
-                        <version>11.1.0</version>
+                        <version>12.3.0</version>
                     </dependency>
                     <dependency>
                         <groupId>it.aboutbits</groupId>
                         <artifactId>java-checkstyle-config</artifactId>
-                        <version>1.0.1</version>
+                        <version>1.1.0</version>
                     </dependency>
                 </dependencies>
             </plugin>
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/Delete.java b/src/main/java/it/aboutbits/springboot/testing/web/request/Delete.java
index f27bcfe..5547b07 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/Delete.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/Delete.java
@@ -1,17 +1,17 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON;
 
 public class Delete extends Request<MockHttpServletRequestBuilder> {
     Delete(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/Get.java b/src/main/java/it/aboutbits/springboot/testing/web/request/Get.java
index 7949d22..1a0d9d7 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/Get.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/Get.java
@@ -1,17 +1,17 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON;
 
 public class Get extends Request<MockHttpServletRequestBuilder> {
     Get(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/HttpTestClient.java b/src/main/java/it/aboutbits/springboot/testing/web/request/HttpTestClient.java
index e6a12c8..5300b98 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/HttpTestClient.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/HttpTestClient.java
@@ -1,45 +1,45 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import lombok.RequiredArgsConstructor;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
+import tools.jackson.databind.json.JsonMapper;
 
 @RequiredArgsConstructor
 public class HttpTestClient {
     private final MockMvc mockMvc;
-    private final ObjectMapper objectMapper;
+    private final JsonMapper jsonMapper;
 
     public Request<MockHttpServletRequestBuilder> get(@NonNull String url, Object... pathVariables) {
-        return new Get(mockMvc, objectMapper, url, pathVariables);
+        return new Get(mockMvc, jsonMapper, url, pathVariables);
     }
 
     public Request<MockHttpServletRequestBuilder> put(@NonNull String url, Object... pathVariables) {
-        return new Put(mockMvc, objectMapper, url, pathVariables);
+        return new Put(mockMvc, jsonMapper, url, pathVariables);
     }
 
     public MultipartRequest putMultipart(@NonNull String url, Object... pathVariables) {
-        return new PutMultipart(mockMvc, objectMapper, url, pathVariables);
+        return new PutMultipart(mockMvc, jsonMapper, url, pathVariables);
     }
 
     public Request<MockHttpServletRequestBuilder> post(@NonNull String url, Object... pathVariables) {
-        return new Post(mockMvc, objectMapper, url, pathVariables);
+        return new Post(mockMvc, jsonMapper, url, pathVariables);
     }
 
     public MultipartRequest postMultipart(@NonNull String url, Object... pathVariables) {
-        return new PostMultipart(mockMvc, objectMapper, url, pathVariables);
+        return new PostMultipart(mockMvc, jsonMapper, url, pathVariables);
     }
 
     public Request<MockHttpServletRequestBuilder> patch(@NonNull String url, Object... pathVariables) {
-        return new Patch(mockMvc, objectMapper, url, pathVariables);
+        return new Patch(mockMvc, jsonMapper, url, pathVariables);
     }
 
     public MultipartRequest patchMultipart(@NonNull String url, Object... pathVariables) {
-        return new PatchMultipart(mockMvc, objectMapper, url, pathVariables);
+        return new PatchMultipart(mockMvc, jsonMapper, url, pathVariables);
     }
 
     public Request<MockHttpServletRequestBuilder> delete(@NonNull String url, Object... pathVariables) {
-        return new Delete(mockMvc, objectMapper, url, pathVariables);
+        return new Delete(mockMvc, jsonMapper, url, pathVariables);
     }
 }
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/MultipartRequest.java b/src/main/java/it/aboutbits/springboot/testing/web/request/MultipartRequest.java
index a98a413..0a4b2d9 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/MultipartRequest.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/MultipartRequest.java
@@ -1,11 +1,11 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.mock.web.MockMultipartFile;
 import org.springframework.mock.web.MockPart;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockMultipartHttpServletRequestBuilder;
+import tools.jackson.databind.json.JsonMapper;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -18,7 +18,7 @@ public abstract class MultipartRequest extends Request<MockMultipartHttpServletR
 
     MultipartRequest(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/Patch.java b/src/main/java/it/aboutbits/springboot/testing/web/request/Patch.java
index aad3170..75c43b7 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/Patch.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/Patch.java
@@ -1,17 +1,17 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON;
 
 public class Patch extends Request<MockHttpServletRequestBuilder> {
     Patch(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/PatchMultipart.java b/src/main/java/it/aboutbits/springboot/testing/web/request/PatchMultipart.java
index d33917e..9cc621d 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/PatchMultipart.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/PatchMultipart.java
@@ -1,16 +1,16 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.http.HttpMethod;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockMultipartHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 public class PatchMultipart extends MultipartRequest {
     PatchMultipart(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/Post.java b/src/main/java/it/aboutbits/springboot/testing/web/request/Post.java
index 767927c..404a8a7 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/Post.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/Post.java
@@ -1,17 +1,17 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON;
 
 public class Post extends Request<MockHttpServletRequestBuilder> {
     Post(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/PostMultipart.java b/src/main/java/it/aboutbits/springboot/testing/web/request/PostMultipart.java
index eb49589..c65395f 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/PostMultipart.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/PostMultipart.java
@@ -1,16 +1,16 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.http.HttpMethod;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockMultipartHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 public class PostMultipart extends MultipartRequest {
     PostMultipart(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/Put.java b/src/main/java/it/aboutbits/springboot/testing/web/request/Put.java
index a076509..78e3aae 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/Put.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/Put.java
@@ -1,17 +1,17 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON;
 
 public class Put extends Request<MockHttpServletRequestBuilder> {
     Put(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/PutMultipart.java b/src/main/java/it/aboutbits/springboot/testing/web/request/PutMultipart.java
index 05255db..82fd1cc 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/PutMultipart.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/PutMultipart.java
@@ -1,16 +1,16 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.NonNull;
 import org.springframework.http.HttpMethod;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.request.MockMultipartHttpServletRequestBuilder;
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import tools.jackson.databind.json.JsonMapper;
 
 public class PutMultipart extends MultipartRequest {
     PutMultipart(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper objectMapper,
             @NonNull String url,
             @NonNull Object... pathVariables
     ) {
diff --git a/src/main/java/it/aboutbits/springboot/testing/web/request/Request.java b/src/main/java/it/aboutbits/springboot/testing/web/request/Request.java
index 8221147..ad52b2a 100644
--- a/src/main/java/it/aboutbits/springboot/testing/web/request/Request.java
+++ b/src/main/java/it/aboutbits/springboot/testing/web/request/Request.java
@@ -1,7 +1,5 @@
 package it.aboutbits.springboot.testing.web.request;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
-import com.fasterxml.jackson.databind.ObjectMapper;
 import it.aboutbits.springboot.toolbox.web.response.ErrorResponse;
 import it.aboutbits.springboot.toolbox.web.response.ItemResponse;
 import it.aboutbits.springboot.toolbox.web.response.ItemResponseWithMeta;
@@ -16,7 +14,9 @@
 import org.springframework.http.MediaType;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.ResultActions;
-import org.springframework.test.web.servlet.request.MockHttpServletRequestBuilder;
+import org.springframework.test.web.servlet.request.AbstractMockHttpServletRequestBuilder;
+import tools.jackson.core.JacksonException;
+import tools.jackson.databind.json.JsonMapper;
 
 import java.io.UnsupportedEncodingException;
 import java.nio.charset.StandardCharsets;
@@ -29,14 +29,14 @@
 import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.httpBasic;
 
 @Slf4j
-public abstract class Request<R extends MockHttpServletRequestBuilder> {
+public abstract class Request<R extends AbstractMockHttpServletRequestBuilder<R>> {
     protected record UsernameAndPassword(String username, String password) {
     }
 
     protected record UrlWithVariables(String url, Object... pathVariables) {
     }
 
-    protected final ObjectMapper objectMapper;
+    protected final JsonMapper jsonMapper;
     protected final MockMvc mockMvc;
     protected final UrlWithVariables url;
     protected final MediaType contentType;
@@ -50,12 +50,12 @@ protected record UrlWithVariables(String url, Object... pathVariables) {
 
     Request(
             @NonNull MockMvc mockMvc,
-            @NonNull ObjectMapper objectMapper,
+            @NonNull JsonMapper jsonMapper,
             @NonNull String url,
             @NonNull MediaType contentType,
             @NonNull Object... pathVariables
     ) {
-        this.objectMapper = objectMapper;
+        this.jsonMapper = jsonMapper;
 
         this.mockMvc = mockMvc;
         this.url = new UrlWithVariables(url, pathVariables);
@@ -74,8 +74,8 @@ public Request<R> body(@NonNull Object body) {
         }
 
         try {
-            this.body = objectMapper.writeValueAsString(body);
-        } catch (JsonProcessingException e) {
+            this.body = jsonMapper.writeValueAsString(body);
+        } catch (JacksonException e) {
             log.error("Failed to write body as JSON.", e);
             throw new RuntimeException(e);
         }
@@ -113,12 +113,12 @@ public <T> ItemResponse<T> returnItem(@NonNull Class<T> clazz) {
 
         var resString = res.andReturn().getResponse().getContentAsString(StandardCharsets.UTF_8);
 
-        var typeFactory = objectMapper.getTypeFactory();
+        var typeFactory = jsonMapper.getTypeFactory();
         var javaType = typeFactory.constructParametricType(ItemResponse.class, clazz);
 
         try {
-            return objectMapper.readValue(resString, javaType);
-        } catch (JsonProcessingException e) {
+            return jsonMapper.readValue(resString, javaType);
+        } catch (JacksonException e) {
             log.error("Failed to read response as JSON.", e);
             throw new RuntimeException(e);
         }
@@ -133,12 +133,12 @@ public <T, M extends Meta> ItemResponseWithMeta<T, M> returnItem(
 
         var resString = res.andReturn().getResponse().getContentAsString(StandardCharsets.UTF_8);
 
-        var typeFactory = objectMapper.getTypeFactory();
+        var typeFactory = jsonMapper.getTypeFactory();
         var javaType = typeFactory.constructParametricType(ItemResponseWithMeta.class, clazz, metaClass);
 
         try {
-            return objectMapper.readValue(resString, javaType);
-        } catch (JsonProcessingException e) {
+            return jsonMapper.readValue(resString, javaType);
+        } catch (JacksonException e) {
             log.error("Failed to read response as JSON.", e);
             throw new RuntimeException(e);
         }
@@ -150,12 +150,12 @@ public <T> ListResponse<T> returnList(@NonNull Class<T> clazz) {
 
         var resString = res.andReturn().getResponse().getContentAsString(StandardCharsets.UTF_8);
 
-        var typeFactory = objectMapper.getTypeFactory();
+        var typeFactory = jsonMapper.getTypeFactory();
         var javaType = typeFactory.constructParametricType(ListResponse.class, clazz);
 
         try {
-            return objectMapper.readValue(resString, javaType);
-        } catch (JsonProcessingException e) {
+            return jsonMapper.readValue(resString, javaType);
+        } catch (JacksonException e) {
             log.error("Failed to read response as JSON.", e);
             throw new RuntimeException(e);
         }
@@ -167,12 +167,12 @@ public <T> PagedResponse<T> returnPage(@NonNull Class<T> clazz) {
 
         var resString = res.andReturn().getResponse().getContentAsString(StandardCharsets.UTF_8);
 
-        var typeFactory = objectMapper.getTypeFactory();
+        var typeFactory = jsonMapper.getTypeFactory();
         var javaType = typeFactory.constructParametricType(PagedResponse.class, clazz);
 
         try {
-            return objectMapper.readValue(resString, javaType);
-        } catch (JsonProcessingException e) {
+            return jsonMapper.readValue(resString, javaType);
+        } catch (JacksonException e) {
             log.error("Failed to read response as JSON.", e);
             throw new RuntimeException(e);
         }
@@ -185,8 +185,8 @@ public ErrorResponse returnError() {
         var resString = res.andReturn().getResponse().getContentAsString(StandardCharsets.UTF_8);
 
         try {
-            return objectMapper.readValue(resString, ErrorResponse.class);
-        } catch (JsonProcessingException e) {
+            return jsonMapper.readValue(resString, ErrorResponse.class);
+        } catch (JacksonException e) {
             log.error("Failed to read response as JSON.", e);
             throw new RuntimeException(e);
         }