diff --git a/backend/src/main/java/org/raddatz/familienarchiv/model/DocumentAnnotation.java b/backend/src/main/java/org/raddatz/familienarchiv/model/DocumentAnnotation.java
index d4e02258..5aaaff2d 100644
--- a/backend/src/main/java/org/raddatz/familienarchiv/model/DocumentAnnotation.java
+++ b/backend/src/main/java/org/raddatz/familienarchiv/model/DocumentAnnotation.java
@@ -4,6 +4,8 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.persistence.*;
 import lombok.*;
 import org.hibernate.annotations.CreationTimestamp;
+import org.hibernate.annotations.JdbcTypeCode;
+import org.hibernate.type.SqlTypes;
 
 import java.time.LocalDateTime;
 import java.util.List;
@@ -53,8 +55,8 @@ public class DocumentAnnotation {
     @Column(name = "file_hash", length = 64)
     private String fileHash;
 
+    @JdbcTypeCode(SqlTypes.JSON)
     @Column(columnDefinition = "jsonb")
-    @Convert(converter = PolygonConverter.class)
     private List<List<Double>> polygon;
 
     @Column(name = "created_by")