diff --git a/app/services/bulk_upload/sales/year2023/csv_parser.rb b/app/services/bulk_upload/sales/year2023/csv_parser.rb
index 80c8296ba..abbc51632 100644
--- a/app/services/bulk_upload/sales/year2023/csv_parser.rb
+++ b/app/services/bulk_upload/sales/year2023/csv_parser.rb
@@ -93,7 +93,7 @@ private
     @normalised_string = File.read(path, encoding: "bom|utf-8")
     @normalised_string.gsub!("\r\n", "\n")
     @normalised_string.scrub!("")
-    @normalised_string.tr("\r", "\n")
+    @normalised_string.tr!("\r", "\n")
 
     @normalised_string
   end