diff --git a/MoviesCommon/src/main/java/at.technikumwien.movies/Actor.java b/MoviesCommon/src/main/java/at.technikumwien.movies/Actor.java
index 9d18939..dc95bf2 100644
--- a/MoviesCommon/src/main/java/at.technikumwien.movies/Actor.java
+++ b/MoviesCommon/src/main/java/at.technikumwien.movies/Actor.java
@@ -32,7 +32,7 @@ import java.time.LocalDate;
 public class Actor {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @XmlTransient
+    @XmlAttribute
     private Long id;
 
     @Column(length = 100, nullable = false)
diff --git a/MoviesCommon/src/main/java/at.technikumwien.movies/Movie.java b/MoviesCommon/src/main/java/at.technikumwien.movies/Movie.java
index 6c97901..8b9679d 100644
--- a/MoviesCommon/src/main/java/at.technikumwien.movies/Movie.java
+++ b/MoviesCommon/src/main/java/at.technikumwien.movies/Movie.java
@@ -27,7 +27,7 @@ import java.util.List;
 public class Movie {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @XmlTransient
+    @XmlAttribute
     private Long id;
 
     @Column(length = 100, nullable = false)
diff --git a/MoviesCommon/src/main/java/at.technikumwien.movies/Studio.java b/MoviesCommon/src/main/java/at.technikumwien.movies/Studio.java
index d9eed27..6c95b90 100644
--- a/MoviesCommon/src/main/java/at.technikumwien.movies/Studio.java
+++ b/MoviesCommon/src/main/java/at.technikumwien.movies/Studio.java
@@ -30,7 +30,7 @@ import javax.xml.bind.annotation.XmlTransient;
 public class Studio {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
-    @XmlTransient
+    @XmlAttribute
     private Long id;
 
     @Column(length = 100, nullable = false)