diff --git a/src/attributes.py b/src/attributes.py
index 9af579e..bbbd26d 100644
--- a/src/attributes.py
+++ b/src/attributes.py
@@ -198,6 +198,6 @@ class Attributes:
         converting input to min/max."""
 
         if value_input in self.target_fitness_type_dict.keys():
-            self._target_fitness_type = target_fitness_type_dict[value_input]
+            self._target_fitness_type = self.target_fitness_type_dict[value_input]
         else:
             self._target_fitness_type = value_input