diff --git a/app/bed_generator/bed_generator.py b/app/bed_generator/bed_generator.py
index 8b035df..cdb6272 100644
--- a/app/bed_generator/bed_generator.py
+++ b/app/bed_generator/bed_generator.py
@@ -43,7 +43,7 @@ class BedGenerator:
         },
         'cnv': {
             'fields': [
-                lambda r, _: str(r['entrez_id'])
+                lambda r, _: f"{r['gene']};{r['accession']}"
             ]
         }
     }