diff --git a/downloads-generation/data_mass_spec_benchmark/write_proteome_peptides.py b/downloads-generation/data_mass_spec_benchmark/write_proteome_peptides.py
index 76fa9bb2e63c96a7ad8fb3e2f863818e1225e515..bc9c72280de549e675d2a93fa1234d365f41259c 100644
--- a/downloads-generation/data_mass_spec_benchmark/write_proteome_peptides.py
+++ b/downloads-generation/data_mass_spec_benchmark/write_proteome_peptides.py
@@ -33,7 +33,7 @@ parser.add_argument(
     "--debug-max-rows",
     metavar="N",
     type=int,
-    default=10,
+    default=None,
     help="Max rows to process. Useful for debugging. If specified an ipdb "
     "debugging session is also opened at the end of the script")
 parser.add_argument(