diff --git a/run_backtest.py b/run_backtest.py
index 3b33279..0b86d6f 100644
--- a/run_backtest.py
+++ b/run_backtest.py
@@ -21,8 +21,7 @@ def entry_times():
 
 def create_strategies(entry_time: str):
     call_spread_strat = DeltaTargetStrategy(
-        delta_upper_bound = 0.11, 
-        delta_lower_bound = 0.10, 
+        delta_target = 0.10, 
         option_type = OptionType.CALL,
         number_of_contracts = 1, 
         spread_width = 50, 
@@ -30,8 +29,7 @@ def create_strategies(entry_time: str):
         trade_entry_time = entry_time
     )
     put_spread_strat = DeltaTargetStrategy(
-        delta_upper_bound = 0.11,
-        delta_lower_bound = 0.10, 
+        delta_target = -0.10, 
         option_type = OptionType.PUT,
         number_of_contracts = 1, 
         spread_width = 50,