diff --git a/ass1-jpa/src/main/java/dst/ass1/jpa/model/impl/Preferences.java b/ass1-jpa/src/main/java/dst/ass1/jpa/model/impl/Preferences.java
index a23bdce..57287bc 100644
--- a/ass1-jpa/src/main/java/dst/ass1/jpa/model/impl/Preferences.java
+++ b/ass1-jpa/src/main/java/dst/ass1/jpa/model/impl/Preferences.java
@@ -10,6 +10,7 @@ import java.util.Map;
 public class Preferences implements IPreferences {
     @Id
     private Long id;
+    @ElementCollection
     private Map<String, String> data;
 
     @OneToOne(fetch = FetchType.LAZY)