diff --git a/mdx-models/src/main/java/com/mx/path/model/mdx/model/challenges/Challenge.java b/mdx-models/src/main/java/com/mx/path/model/mdx/model/challenges/Challenge.java
index 6d732be1..e1687502 100644
--- a/mdx-models/src/main/java/com/mx/path/model/mdx/model/challenges/Challenge.java
+++ b/mdx-models/src/main/java/com/mx/path/model/mdx/model/challenges/Challenge.java
@@ -3,6 +3,7 @@
 import java.util.List;
 
 import com.mx.path.model.mdx.model.MdxBase;
+import com.mx.path.model.mdx.model.authorization.Authorization;
 
 public final class Challenge extends MdxBase<Challenge> {
   private String id;
@@ -12,6 +13,7 @@ public final class Challenge extends MdxBase<Challenge> {
   private String[] modes;
   private String format;
   private List<Action> actions;
+  private Authorization authorization;
 
   public String getId() {
     return id;
@@ -68,4 +70,12 @@ public List<Action> getActions() {
   public void setActions(List<Action> actions) {
     this.actions = actions;
   }
+
+  public Authorization getAuthorization() {
+    return authorization;
+  }
+
+  public void setAuthorization(Authorization authorization) {
+    this.authorization = authorization;
+  }
 }