diff --git a/src/arcaea_offline/calculate/world_step.py b/src/arcaea_offline/calculate/world_step.py
index 8c64179..a7e48c3 100644
--- a/src/arcaea_offline/calculate/world_step.py
+++ b/src/arcaea_offline/calculate/world_step.py
@@ -25,7 +25,7 @@ class PartnerBonus:
     def __init__(
         self,
         *,
-        step_bonus: Union[Decimal, str, float, int] = Decimal("1.0"),
+        step_bonus: Union[Decimal, str, float, int] = Decimal("0.0"),
         final_multiplier: Union[Decimal, str, float, int] = Decimal("1.0"),
     ):
         self.__step_bonus = step_bonus