diff --git a/build.gradle b/build.gradle
index 2a2e7ba..314bedc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,11 +1,11 @@
 buildscript {
     ext {
-        springSecurityVersion = "5.4.5"
+        springSecurityVersion = "5.4.6"
     }
 }
 
 plugins {
-    id 'org.springframework.boot' version '2.4.3'
+    id 'org.springframework.boot' version '2.4.5'
     id 'io.spring.dependency-management' version '1.0.11.RELEASE'
     id 'java'
 }
@@ -31,14 +31,14 @@ dependencies {
     implementation("io.jsonwebtoken:jjwt:0.9.1")
 
 
-    implementation "org.projectlombok:lombok:1.18.18"
+    implementation "org.projectlombok:lombok:1.18.20"
     implementation 'com.google.code.gson:gson:2.8.6'
     implementation group: 'javax.validation', name: 'validation-api', version: '2.0.1.Final'
     implementation group: 'ch.qos.logback', name: 'logback-classic', version: '1.2.3'
     implementation group: 'commons-io', name: 'commons-io', version: '2.8.0'
 
     // https://mvnrepository.com/artifact/com.google.guava/guava
-    // implementation group: 'com.google.guava', name: 'guava', version: '30.1-jre' // It will be usefull later..
+    // implementation group: 'com.google.guava', name: 'guava', version: '30.1.1-jre' // It will be usefull later..
 
     testImplementation group: 'org.springframework.security', name: 'spring-security-test', version: springSecurityVersion
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
diff --git a/src/main/java/eu/openaire/urls_worker/models/Assignment.java b/src/main/java/eu/openaire/urls_worker/models/Assignment.java
index 887b07b..2e916cf 100644
--- a/src/main/java/eu/openaire/urls_worker/models/Assignment.java
+++ b/src/main/java/eu/openaire/urls_worker/models/Assignment.java
@@ -25,6 +25,8 @@ public class Assignment {
     @JsonProperty("date")
     private Date date;
 
+    public Assignment() {}
+
     public Assignment(List<Task> tasks, String workerId, Date date) {
         this.tasks = tasks;
         this.workerId = workerId;
diff --git a/src/main/java/eu/openaire/urls_worker/models/Datasource.java b/src/main/java/eu/openaire/urls_worker/models/Datasource.java
new file mode 100644
index 0000000..ffb0aaf
--- /dev/null
+++ b/src/main/java/eu/openaire/urls_worker/models/Datasource.java
@@ -0,0 +1,52 @@
+package eu.openaire.urls_worker.models;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@JsonPropertyOrder({
+        "id",
+        "name"
+})
+public class Datasource {
+
+    @JsonProperty("id")
+    String id;
+
+    @JsonProperty("name")
+    String name;
+
+    public Datasource() {}
+
+    public Datasource(String id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+
+    @Override
+    public String toString() {
+        return "Datasource{" +
+                "id='" + id + '\'' +
+                ", name='" + name + '\'' +
+                '}';
+    }
+
+}
diff --git a/src/main/java/eu/openaire/urls_worker/models/Task.java b/src/main/java/eu/openaire/urls_worker/models/Task.java
index a4414be..f2ae0e6 100644
--- a/src/main/java/eu/openaire/urls_worker/models/Task.java
+++ b/src/main/java/eu/openaire/urls_worker/models/Task.java
@@ -8,7 +8,8 @@ import com.fasterxml.jackson.annotation.JsonPropertyOrder;
 @JsonInclude(JsonInclude.Include.NON_NULL)
 @JsonPropertyOrder({
         "id",
-        "url"
+        "url",
+        "datasource"
 })
 public class Task {
 
@@ -18,6 +19,17 @@ public class Task {
     @JsonProperty("url")
     private String url;
 
+    @JsonProperty("datasource")
+    private Datasource datasource;
+
+    public Task() {}
+
+    public Task(String id, String url, Datasource datasource) {
+        this.id = id;
+        this.url = url;
+        this.datasource = datasource;
+    }
+
     public String getId() {
         return id;
     }
@@ -34,11 +46,20 @@ public class Task {
         this.url = url;
     }
 
+    public Datasource getDatasource() {
+        return datasource;
+    }
+
+    public void setDatasource(Datasource datasource) {
+        this.datasource = datasource;
+    }
+
     @Override
     public String toString() {
         return "Task{" +
                 "id='" + id + '\'' +
                 ", url='" + url + '\'' +
+                ", datasource=" + datasource +
                 '}';
     }
 }
diff --git a/src/main/java/eu/openaire/urls_worker/payloads/requests/AssignmentRequest.java b/src/main/java/eu/openaire/urls_worker/payloads/requests/AssignmentRequest.java
index a480edc..08f8e50 100644
--- a/src/main/java/eu/openaire/urls_worker/payloads/requests/AssignmentRequest.java
+++ b/src/main/java/eu/openaire/urls_worker/payloads/requests/AssignmentRequest.java
@@ -11,6 +11,8 @@ public class AssignmentRequest {
     @JsonProperty("assignment")
     private Assignment assignment;
 
+    public AssignmentRequest() { }
+
     public AssignmentRequest(Assignment assignment) {
         this.assignment = assignment;
     }