diff --git a/modules/jooby-graphql/pom.xml b/modules/jooby-graphql/pom.xml
index 45512fb9fd..133296fd43 100644
--- a/modules/jooby-graphql/pom.xml
+++ b/modules/jooby-graphql/pom.xml
@@ -18,12 +18,6 @@
       <version>${jooby.version}</version>
     </dependency>
 
-    <dependency>
-      <groupId>com.google.code.gson</groupId>
-      <artifactId>gson</artifactId>
-      <optional>true</optional>
-    </dependency>
-
     <!-- graphql -->
     <dependency>
       <groupId>com.graphql-java</groupId>
@@ -50,36 +44,4 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
-
-  <build>
-    <plugins>
-      <plugin>
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-shade-plugin</artifactId>
-        <executions>
-          <execution>
-            <id>fat-jar</id>
-            <goals>
-              <goal>shade</goal>
-            </goals>
-            <phase>package</phase>
-            <configuration>
-              <minimizeJar>true</minimizeJar>
-              <artifactSet>
-                <includes>
-                  <include>com.google.code.gson:*</include>
-                </includes>
-              </artifactSet>
-              <relocations>
-                <relocation>
-                  <pattern>com.google.gson</pattern>
-                  <shadedPattern>${shaded.package}.gson</shadedPattern>
-                </relocation>
-              </relocations>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
-    </plugins>
-  </build>
 </project>
diff --git a/modules/jooby-graphql/src/main/java/io/jooby/graphql/GraphQLModule.java b/modules/jooby-graphql/src/main/java/io/jooby/graphql/GraphQLModule.java
index 36998aaa3c..ff9f22afed 100644
--- a/modules/jooby-graphql/src/main/java/io/jooby/graphql/GraphQLModule.java
+++ b/modules/jooby-graphql/src/main/java/io/jooby/graphql/GraphQLModule.java
@@ -31,6 +31,9 @@
  * <p>Usage:
  *
  * <pre>{@code
+ * // required:
+ * install(new Jackson2Module()); // or Jackson3Module, or AvajeJsonBModule, etc.
+ *
  * install(new GrapQLModule(graphQL));
  *
  * }</pre>
@@ -39,6 +42,8 @@
  * the route path by setting the <code>graphql.path</code> property in your application
  * configuration file.
  *
+ * <p>NOTE: From 4.5.0 You must install a json module.
+ *
  * @author edgar
  * @since 2.4.0
  */
diff --git a/modules/jooby-graphql/src/main/java/io/jooby/graphql/package-info.java b/modules/jooby-graphql/src/main/java/io/jooby/graphql/package-info.java
index 794ab4a913..650f04e550 100644
--- a/modules/jooby-graphql/src/main/java/io/jooby/graphql/package-info.java
+++ b/modules/jooby-graphql/src/main/java/io/jooby/graphql/package-info.java
@@ -1,2 +1,24 @@
+/**
+ * GraphQL module on top of https://www.graphql-java.com.
+ *
+ * <p>Usage:
+ *
+ * <pre>{@code
+ * // required:
+ * install(new Jackson2Module()); // or Jackson3Module, or AvajeJsonBModule, etc.
+ *
+ * install(new GrapQLModule(graphQL));
+ *
+ * }</pre>
+ *
+ * Module install a GET and POST route under <code>/graphql</code> path. Optionally, you can change
+ * the route path by setting the <code>graphql.path</code> property in your application
+ * configuration file.
+ *
+ * <p>NOTE: From 4.5.0 You must install a json module.
+ *
+ * @author edgar
+ * @since 2.4.0
+ */
 @org.jspecify.annotations.NullMarked
 package io.jooby.graphql;
diff --git a/modules/jooby-graphql/src/main/java/io/jooby/internal/graphql/GraphQLHandler.java b/modules/jooby-graphql/src/main/java/io/jooby/internal/graphql/GraphQLHandler.java
index d7b3c1770c..97a3e92e27 100644
--- a/modules/jooby-graphql/src/main/java/io/jooby/internal/graphql/GraphQLHandler.java
+++ b/modules/jooby-graphql/src/main/java/io/jooby/internal/graphql/GraphQLHandler.java
@@ -8,18 +8,15 @@
 import java.util.Collections;
 import java.util.Map;
 
-import com.google.gson.Gson;
-import com.google.gson.GsonBuilder;
 import graphql.ExecutionInput;
 import graphql.ExecutionResult;
 import graphql.GraphQL;
 import io.jooby.Context;
 import io.jooby.Route;
 import io.jooby.Router;
+import io.jooby.json.JsonDecoder;
 
 public class GraphQLHandler implements Route.Handler {
-  private static final Gson json = new GsonBuilder().create();
-
   protected GraphQL graphQL;
 
   public GraphQLHandler(GraphQL graphQL) {
@@ -36,6 +33,7 @@ protected final ExecutionInput newExecutionInput(Context ctx) {
     if (ctx.getMethod().equals(Router.POST)) {
       request = ctx.body(GraphQLRequest.class);
     } else {
+      var json = ctx.require(JsonDecoder.class);
       request = new GraphQLRequest();
       String query = ctx.query("query").value();
       String operationName = ctx.query("operationName").valueOrNull();
@@ -43,7 +41,7 @@ protected final ExecutionInput newExecutionInput(Context ctx) {
           ctx.query("variables")
               .toOptional()
               .filter(string -> !string.equals("{}"))
-              .map(str -> json.<Map<String, Object>>fromJson(str, Map.class))
+              .map(str -> json.<Map<String, Object>>decode(str, Map.class))
               .orElseGet(Collections::emptyMap);
       request.setOperationName(operationName);
       request.setQuery(query);
diff --git a/modules/jooby-graphql/src/main/java/module-info.java b/modules/jooby-graphql/src/main/java/module-info.java
index 02c07a5e36..a68140642b 100644
--- a/modules/jooby-graphql/src/main/java/module-info.java
+++ b/modules/jooby-graphql/src/main/java/module-info.java
@@ -11,5 +11,4 @@
   requires static org.jspecify;
   requires typesafe.config;
   requires com.graphqljava;
-  requires com.google.gson;
 }