diff --git a/core/simulation_engine.py b/core/simulation_engine.py
index 1f5abb2..4a81638 100644
--- a/core/simulation_engine.py
+++ b/core/simulation_engine.py
@@ -34,7 +34,7 @@ class SimulationEngine:
         self.running = True
 
     @staticmethod
-    def _setup_world(self):
+    def _setup_world():
         world = World(CELL_SIZE, (CELL_SIZE * GRID_WIDTH, CELL_SIZE * GRID_HEIGHT))
         random.seed(RANDOM_SEED)