diff --git a/src/models/file.js b/src/models/file.js
index 2b94aa4..6cc45a1 100644
--- a/src/models/file.js
+++ b/src/models/file.js
@@ -335,7 +335,9 @@ class File {
         }
       }
     }  
-    return result.map((res)=>res.replace(/;/g, ','));
+    return result.map((res)=>{ 
+      return typeof res === "string" ? res.replace(/;/g, ',') : res
+    });
   }
 }