diff --git a/downloads-generation/models_class1/generate_hyperparameters.py b/downloads-generation/models_class1/generate_hyperparameters.py
index e12f4ef58cc57876b15d542111bc000d6537a2f6..4cbd1f2b43562c3f055b2cc729182e724477fd49 100644
--- a/downloads-generation/models_class1/generate_hyperparameters.py
+++ b/downloads-generation/models_class1/generate_hyperparameters.py
@@ -25,7 +25,7 @@ base_hyperparameters = {
     ##########################################
     # RANDOM NEGATIVE PEPTIDES
     ##########################################
-    "random_negative_rate": 0.2,
+    "random_negative_rate": 0.0,
     "random_negative_constant": 25,
     "random_negative_affinity_min": 20000.0,
     "random_negative_affinity_max": 50000.0,